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Updated Mar 22, 2026
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Výrazy: Násobenie a Delenie
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Základné pojmy a pravidlá
Pred tým, než sa pustíš do násobenia a delenia, musíš vedieť základné pojmy. Jednočlen je buď číslo, písmeno alebo ich súčin (napríklad 5x, 3ab²). Mnohočlen je súčet alebo rozdiel jednočlenov .
Koeficient je číslo pred premennou (v 5x je to číslo 5), exponent je malé číslo hore (v x³ je to trojka). Dôležité sú aj podobné členy - to jsou jednočleny s rovnakými premennými a exponentmi (3x² a 5x² sú podobné).
Zapamätaj si hlavné pravidlo pre mocniny: pri násobení rovnakých základov sčítaš exponenty , pri delení ich odčítaš .
Tip: Toto pravidlo pre mocniny budeš používať stále, takže si ho poriadne zapamätaj!
Násobenie výrazov
Pri násobení jednočlena jednočlenom postupuješ jednoducho: najprv vynásobíš čísla, potom premenné. Ak máš rovnaké premenné, sčítaš exponenty. Príklad: 3x² × 5x³ = 15x⁵.
Násobenie jednočlena mnohočlenom funguje pomocou distributívneho zákona - jednočlenom vynásobíš každý člen v zátvorke. Takže 2x × = 6x² + 8xy.
Pri násobení mnohočlena mnohočlenom musíš každý člen z prvej zátvorky vynásobiť každým členom z druhej zátvorky. Je to trochu dlhšie, ale princíp je rovnaký. Na konci nezabudni zjednodušiť podobné členy.
Pozor: Najčastejšia chyba sú znamienka! Mínus krát mínus je plus, mínus krát plus je mínus.
Príklad násobenia mnohočlenov
Ukážme si × krok za krokom. Najprv x z prvej zátvorky násobíš oboma členmi z druhej: x × x = x² a x × (-3) = -3x.
Potom číslo 2 z prvej zátvorky násobíš oboma členmi z druhej: 2 × x = 2x a 2 × (-3) = -6. Spolu máš x² - 3x + 2x - 6.
Nakonec zjednoduš podobné členy: -3x + 2x = -x. Výsledok je x² - x - 6. Vidíš, že nie je to také zložité, len treba byť presný.
Pomôcka: Môžeš si predstaviť "každý s každým" - každý člen z jednej zátvorky musí "navštíviť" každý člen z druhej.
Delenie výrazov
Delenie jednočlena jednočlenom je ako násobenie, len opačne. Delíš čísla a odčítavaš exponenty rovnakých premenných. Príklad: 12x⁵ ÷ 3x² = 4x³.
Pri delení mnohočlena jednočlenom delíš každý člen mnohočlena tým jednočlenom. Takže ÷ 3x = 2x² - 3x + 1.
Dôležité je, že nikdy nemôžeš deliť nulou! Ak máš v menovateli premennú, tá premenná nesmie byť nula. Vždy si to zapíš ako podmienku.
Upozornenie: Delenie nulou je matematicky nemožné - takže si vždy skontroluj, či menovateľ môže byť nula!
Riešené príklady
Pozrime si násobenie jednočlena mnohočlenom: 5a × . Postupne: 5a × 2a² = 10a³, potom 5a × = -15a², nakoniec 5a × 1 = 5a. Výsledok: 10a³ - 15a² + 5a.
Pri delení 24m⁶n⁴ ÷ delíš koeficienty: 24 ÷ (-8) = -3. Exponenty odčítaš: m⁶⁻³ = m³ a n⁴⁻¹ = n³. Výsledok je -3m³n³.
Nezabudni na podmienky! Keď delíš výrazom s premennou, tá premenná nesmie byť nula. V tomto príplade m ≠ 0 a n ≠ 0.
Kontrola: Po každom príklade si skontroluj, či si správne zaobchádzal so znamienkami a exponentmi.
Dôležité tipy a súhrn
Zapamätaj si pravidlá pre znamienka: mínus krát mínus je plus, mínus krát plus je mínus. Pri práci s exponentmi násobenie znamená sčítanie exponentov, delenie znamená odčítanie.
Vždy postupuj systematicky: najprv koeficienty, potom premenné. Po každom výpočte skontroluj, či môžeš zjednodušiť podobné členy. Pri delení nezabudni na podmienky.
Rýchly prehľad: Násobenie jednočlenov = násobím čísla, sčítam exponenty. Násobenie s mnohočlenmi = každý s každým. Delenie = opačne ako násobenie, exponenty odčítam.
Záver: S týmito pravidlami zvládneš akýkoľvek príklad s násobením a delením výrazov - len buď presný a metodický!
We thought you’d never ask...
What is the Knowunity AI companion?
Our AI companion is specifically built for the needs of students. Based on the millions of content pieces we have on the platform we can provide truly meaningful and relevant answers to students. But its not only about answers, the companion is even more about guiding students through their daily learning challenges, with personalised study plans, quizzes or content pieces in the chat and 100% personalisation based on the students skills and developments.
Where can I download the Knowunity app?
You can download the app in the Google Play Store and in the Apple App Store.
Is Knowunity really free of charge?
That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.
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The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️
Thomas R
iOS user
Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades
Brad T
Android user
Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend
Aubrey
iOS user
Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀
Marco B
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE Knowunity AI. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!
Paul T
iOS user
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️
Thomas R
iOS user
Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades
Brad T
Android user
Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend
Aubrey
iOS user
Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀
Marco B
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE Knowunity AI. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!
Paul T
iOS user
Výrazy: Násobenie a Delenie
Naučíš sa, ako násobíť a deliť algebraické výrazy - teda ako pracovať s písmenkami a číslami v matematike. Toto ťa čaká pri riešení rovníc a zložitejších úloh, takže si to rozhodne treba osvojiť.
Základné pojmy a pravidlá
Pred tým, než sa pustíš do násobenia a delenia, musíš vedieť základné pojmy. Jednočlen je buď číslo, písmeno alebo ich súčin (napríklad 5x, 3ab²). Mnohočlen je súčet alebo rozdiel jednočlenov .
Koeficient je číslo pred premennou (v 5x je to číslo 5), exponent je malé číslo hore (v x³ je to trojka). Dôležité sú aj podobné členy - to jsou jednočleny s rovnakými premennými a exponentmi (3x² a 5x² sú podobné).
Zapamätaj si hlavné pravidlo pre mocniny: pri násobení rovnakých základov sčítaš exponenty , pri delení ich odčítaš .
Tip: Toto pravidlo pre mocniny budeš používať stále, takže si ho poriadne zapamätaj!
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Násobenie výrazov
Pri násobení jednočlena jednočlenom postupuješ jednoducho: najprv vynásobíš čísla, potom premenné. Ak máš rovnaké premenné, sčítaš exponenty. Príklad: 3x² × 5x³ = 15x⁵.
Násobenie jednočlena mnohočlenom funguje pomocou distributívneho zákona - jednočlenom vynásobíš každý člen v zátvorke. Takže 2x × = 6x² + 8xy.
Pri násobení mnohočlena mnohočlenom musíš každý člen z prvej zátvorky vynásobiť každým členom z druhej zátvorky. Je to trochu dlhšie, ale princíp je rovnaký. Na konci nezabudni zjednodušiť podobné členy.
Pozor: Najčastejšia chyba sú znamienka! Mínus krát mínus je plus, mínus krát plus je mínus.
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Príklad násobenia mnohočlenov
Ukážme si × krok za krokom. Najprv x z prvej zátvorky násobíš oboma členmi z druhej: x × x = x² a x × (-3) = -3x.
Potom číslo 2 z prvej zátvorky násobíš oboma členmi z druhej: 2 × x = 2x a 2 × (-3) = -6. Spolu máš x² - 3x + 2x - 6.
Nakonec zjednoduš podobné členy: -3x + 2x = -x. Výsledok je x² - x - 6. Vidíš, že nie je to také zložité, len treba byť presný.
Pomôcka: Môžeš si predstaviť "každý s každým" - každý člen z jednej zátvorky musí "navštíviť" každý člen z druhej.
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Delenie výrazov
Delenie jednočlena jednočlenom je ako násobenie, len opačne. Delíš čísla a odčítavaš exponenty rovnakých premenných. Príklad: 12x⁵ ÷ 3x² = 4x³.
Pri delení mnohočlena jednočlenom delíš každý člen mnohočlena tým jednočlenom. Takže ÷ 3x = 2x² - 3x + 1.
Dôležité je, že nikdy nemôžeš deliť nulou! Ak máš v menovateli premennú, tá premenná nesmie byť nula. Vždy si to zapíš ako podmienku.
Upozornenie: Delenie nulou je matematicky nemožné - takže si vždy skontroluj, či menovateľ môže byť nula!
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Riešené príklady
Pozrime si násobenie jednočlena mnohočlenom: 5a × . Postupne: 5a × 2a² = 10a³, potom 5a × = -15a², nakoniec 5a × 1 = 5a. Výsledok: 10a³ - 15a² + 5a.
Pri delení 24m⁶n⁴ ÷ delíš koeficienty: 24 ÷ (-8) = -3. Exponenty odčítaš: m⁶⁻³ = m³ a n⁴⁻¹ = n³. Výsledok je -3m³n³.
Nezabudni na podmienky! Keď delíš výrazom s premennou, tá premenná nesmie byť nula. V tomto príplade m ≠ 0 a n ≠ 0.
Kontrola: Po každom príklade si skontroluj, či si správne zaobchádzal so znamienkami a exponentmi.
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Dôležité tipy a súhrn
Zapamätaj si pravidlá pre znamienka: mínus krát mínus je plus, mínus krát plus je mínus. Pri práci s exponentmi násobenie znamená sčítanie exponentov, delenie znamená odčítanie.
Vždy postupuj systematicky: najprv koeficienty, potom premenné. Po každom výpočte skontroluj, či môžeš zjednodušiť podobné členy. Pri delení nezabudni na podmienky.
Rýchly prehľad: Násobenie jednočlenov = násobím čísla, sčítam exponenty. Násobenie s mnohočlenmi = každý s každým. Delenie = opačne ako násobenie, exponenty odčítam.
Záver: S týmito pravidlami zvládneš akýkoľvek príklad s násobením a delením výrazov - len buď presný a metodický!
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
We thought you’d never ask...
What is the Knowunity AI companion?
Our AI companion is specifically built for the needs of students. Based on the millions of content pieces we have on the platform we can provide truly meaningful and relevant answers to students. But its not only about answers, the companion is even more about guiding students through their daily learning challenges, with personalised study plans, quizzes or content pieces in the chat and 100% personalisation based on the students skills and developments.
Where can I download the Knowunity app?
You can download the app in the Google Play Store and in the Apple App Store.
Is Knowunity really free of charge?
That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.
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The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️
Thomas R
iOS user
Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades
Brad T
Android user
Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend
Aubrey
iOS user
Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀
Marco B
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE Knowunity AI. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!
Paul T
iOS user
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️
Thomas R
iOS user
Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades
Brad T
Android user
Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend
Aubrey
iOS user
Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀
Marco B
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE Knowunity AI. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!
Paul T
iOS user