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

Last updated at Dec. 16, 2024 by

Ex 9.5, 2 - Chapter 9 Class 8 Algebraic Expressions and Identities - Part 7

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Question 2 Use the identity (๐‘ฅ+๐‘Ž)(๐‘ฅ+๐‘)=๐‘ฅ^2+(๐‘Ž+๐‘)๐‘ฅ+๐‘Ž๐‘ to find the following products. (vii) (๐‘ฅ๐‘ฆ๐‘งโˆ’4) (๐‘ฅ๐‘ฆ๐‘งโˆ’2) (๐‘ฅ๐‘ฆ๐‘งโˆ’4) (๐‘ฅ๐‘ฆ๐‘งโˆ’2) = (๐‘ฅ๐‘ฆ๐‘ง+(โˆ’4)) (๐‘ฅ๐‘ฆ๐‘ง+(โˆ’2)) (๐‘ก+๐‘Ž)(๐‘ก+๐‘)=๐‘ก^2+(๐‘Ž+๐‘)๐‘ก+๐‘Ž๐‘ Putting ๐‘ก = ๐‘ฅ๐‘ฆ๐‘ง , ๐‘Ž = โˆ’4 & ๐‘ = โˆ’2 = (๐‘)^2+(7)^2โˆ’2(๐‘)(7) = ๐‘^2+49โˆ’(2ร—7)ร—๐‘ = ๐’ƒ^๐Ÿ+๐Ÿ’๐Ÿ—โˆ’๐Ÿ๐Ÿ’๐’ƒ

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