Question

Using suitable identity evaluate : (9.7)^2​

Answer 1

${(9.7)}^{2} = {(9 + 0.7)}^{2} \\ = 81 + 2 \times 9 \times 0.7 + 0.49 \\ = 81 + 12.6 + 0.49 \\ = 94.09$

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