Question

(8.3×7.7) by using identity

Answer 1

Using (a+b)(a-b)=a^2-b^2
8.3*7.7=(8+0.3)(8-0.3)=8^2-(0.3)^2=64-0.09=63.91

Answer 2

$\huge\red{SolUTioN}$

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ANSWER=63.91