Question

a-7×a+9
$(a - 7)(a + 9)$
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Answer 1

$(a - 7)(a + 9) = > a(a + 9) - 7(a + 9) \\ \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = > {a}^{2} + 9a - 7a - 63 \\ \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = > {a}^{2} + 2a - 63 \\ \\ \\ hope \: it \: helps \: you$

Answer 2

Answer:

Step-by-step explanation:

(a-7) (a+9)

= a^ -7a +9a -63

= a^ + 2a -63

Hope it's help u