Algebra Identities and Formulas

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Chapter 8 Class 8 Algebraic Expressions and Identities
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Question 2 (iv) - Algebra Identities and Formulas - Chapter 8 Class 8 Algebraic Expressions and Identities

Last updated at May 29, 2023 by

Ex 9.5, 2 - Chapter 9 Class 8 Algebraic Expressions and Identities - Part 4

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Transcript

Question 2 Use the identity (𝑥+𝑎)(𝑥+𝑏)=𝑥^2+(𝑎+𝑏)𝑥+𝑎𝑏 to find the following products. (iv) (4𝑥+5)(4𝑥−1) (4𝑥+5)(4𝑥−1) = (4𝑥+5) (4𝑥+(−1)) (𝑦+𝑎)(𝑦+𝑏)=𝑦^2+(𝑎+𝑏)𝑦+𝑎𝑏 Putting 𝑦 = 4𝑥 , 𝑎 = 5 & 𝑏 = −1 (𝑦+𝑎)(𝑦+𝑏)=𝑦^2+(𝑎+𝑏)𝑦+𝑎𝑏 Putting 𝑦 = 4𝑥 , 𝑎 = 5 & 𝑏 = −1

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