Question

(a + 7) (a - 10) + 16​

Answer 1

$(a + 7)(a - 10) + 16 \\ = a(a - 10) + 7(a - 10) + 16 \\ = {a}^{2} - 10a + 7a - 70 + 16 \\ = {a}^{2} - 3a - 54$

Answer 2

(a + 7) (a - 10) + 16

a²-10a+7a-70+16

a²-3a-54

a²-9a+6a-54

a(a-9)+6(a-9)

(a+6)(a-9)

a=9 a= -6

Hope this helps you

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