Effect of Heat & Temperature on Matter | Changes Around Us | Middle School | Science

Updated September 2026, 2 weeks ago

Effect of Heat & Temperature on Matter | Changes Around Us | Middle School | Science | Khan Academy

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$Factorisation using identities | Algebraic expression & Identities| OD Grade 9 | Math | Khan Academy In this video, you will learn how to master the factorization of the advanced algebraic identity $a^4 + a^2b^2 + b^4$. We start with a clear, step-by-step breakdown of how this specific quartic expression is broken down into its quadratic factors, $(a^2 + ab + b^2)(a^2 - ab + b^2)$. This video walks through multiple solved examples of problems on factorization using different algebraic identities. Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now! https://www.khanacademy.org/math/class-9-algebra-od/x46dfd2740ea2b9e7:algebraic-expression-and-identities?lang=en Timestamps: 00:00 - Factorizing Algebraic Identity a^{4}+a^{2}b^{2}+b^{4} 01:50 - Factorization using Algebraic Identity- Solved Example 1 02:25 - Factorization using Algebraic Identity- Solved Example 2 03:19 - Factorization using Algebraic Identity- Solved Example 3 06:32 - Factorization using Algebraic Identity- Solved Example 4 Khan Academy India is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We have videos and exercises that have been translated into multiple Indian languages, and 15 million people around the globe learn on Khan Academy every month. Support Us: https://india.khanacademy.org/donate$

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$Read, Write Fractions | Fractions | MH Grade 3| Math | Khan Academy Ever wondered how one cookie can be shared fairly between two friends? 🍪 In this lesson, we learn what fractions really mean, how a whole can be divided into equal parts, and how to read and write fractions confidently. Youll discover numerators, denominators, and how fractions help us describe parts of a whole. With simple examples and visuals, fractions become easy and fun to understand! Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now! https://www.khanacademy.org/math/mh-math-class-3-new/xa7b65308c92e651a:untitled-176?lang=en Timestamps: 00:00 Introduction – What is a Whole? 01:12 What is a Fraction? 01:56 Writing Fractions (1/2 Example) 02:20 Numerator and Denominator 02:51 Reading Fractions from Pictures 03:42 Reverse Thinking 04:00 Summary Khan Academy India is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We have videos and exercises that have been translated into multiple Indian languages, and 15 million people around the globe learn on Khan Academy every month. Support Us: https://india.khanacademy.org/donate$