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

 

  1. Chapter 9 Class 8 Algebraic Expressions and Identities
  2. Serial order wise

Transcript

Ex 9.5, 6 Using identities, evaluate. (i) γ€–71γ€—^2 γ€–71γ€—^2 =(70+1)^2 (π‘Ž+𝑏)^2=π‘Ž^2+𝑏^2+2π‘Žπ‘ Putting π‘Ž = 70 & 𝑏 = 1 = (70)^2+(1)^2+2(70)(1) = 4900+1+140 = πŸ“πŸŽπŸ’πŸ

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