Evaluate 87 whole square using identity 2 – InterviewSolution

1.

Evaluate 87 whole square using identity 2

Answer»

Answer:

7569

Step-by-step EXPLANATION:

(87)^2

=(80 + 7)^2

= (80)^2 + 2×80×7 + (7)^2

= 6400 + 1120 + 49

= 7569

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