Question 6 (i) - Algebra Identities - Identity IV - Chapter 8 Class 8 Algebraic Expressions and Identities

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Ex 9.5, 6 - Using identities, evaluate (i) 71^2 (ii) 99^2 (iii) 102^2

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Question 6 Using identities, evaluate. (i) ใ€–71ใ€—^2 ใ€–71ใ€—^2 =(70+1)^2 (๐‘Ž+๐‘)^2=๐‘Ž^2+๐‘^2+2๐‘Ž๐‘ Putting ๐‘Ž = 70 & ๐‘ = 1 = (70)^2+(1)^2+2(70)(1) = 4900+1+140 = ๐Ÿ“๐ŸŽ๐Ÿ’๐Ÿ

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