Question

using suitable identity, evaluate (9.7)^2.

Answer 1

(10-0.3)^2 = 10^2 + (0.3)^2 - 2(10)(0.3) = 100 + 0.09 - 6 = 94.09

Answer 2

Answer:

9.7²=(10-0.3)

using (a-b)²=a²-2ab+b²

(10)²-2×10×0.3+(0.3)²

100-6+0.09

=94.09

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