Question

(a+7)^2 +(a-7)^2 simplify​

Answer 1

$(a + 7) ^{2} + (a - 7) ^{2} \\ \\ = [{a}^{2} + 2(a)(7) + {7}^{2} ] + [ {a}^{2} - 2(a)(7) + {7}^{2} ] \\ \\ = {a}^{2} + 14a + 49 + {a}^{2} - 14a + 49 \\ \\ = 2 {a}^{2} + 98 \\ \\ = 2( {a}^{2} + 49)$

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