Ex 9.4, 3 (vi) - Chapter 9 Class 8 Algebraic Expressions and Identities

Last updated at Dec. 24, 2018 by Teachoo

Transcript

Ex 9.4, 3 Simplify. (vi) (𝑥+𝑦)(𝑥^2−𝑥𝑦+𝑦^2 ) (𝑥+𝑦)(𝑥^2−𝑥𝑦+𝑦^2 ) = 𝑥(𝑥^2−𝑥𝑦+𝑦^2 )+𝑦(𝑥^2−𝑥𝑦+𝑦^2 ) = (𝑥×𝑥^2 )−(𝑥×𝑥𝑦)+(𝑥×𝑦^2 )+(𝑦×𝑥^2 )−(𝑦×𝑥𝑦)+(𝑦×𝑦^2 ) = 𝑥^3−𝑥^2 𝑦+𝑥𝑦^2+𝑦𝑥^2−𝑥𝑦^2+𝑦^3 = 𝑥^3−𝑥^2 𝑦+𝑥^2 𝑦+𝑥𝑦^2−𝑥𝑦^2+𝑦^3 = 𝑥^3−𝑥^2 𝑦+𝑥^2 𝑦+𝑦^3 = 𝒙^𝟑+𝒚^𝟑 (𝑦𝑥^2=𝑥^2 𝑦)

Multiplication of Polynoimals by Polynomials

Ex 9.4, 3 (vi) You are here

Algebra Identities - Identity I →

Chapter 9 Class 8 Algebraic Expressions and Identities

Concept wise

Basic Definitions
Addition and Subtraction of Algebraic Expressions
Multiplication of Monomials
Multiplication of Monomials by Binomials and Trinomials
Multiplication of Polynoimals by Polynomials
Algebra Identities - Identity I
Algebra Identities - Identity II
Algebra Identities - Identity III
Algebra Identities - Identity IV

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Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 9 years. He provides courses for Maths and Science at Teachoo.