Question

Factories the following-

a²-7a-18​

Answer 1

Step-by-step explanation:

a²-9a+2a-18

a(a-9)+2(a-9)

(a+2)(a-9)

Answer 2

$\begin{array}{l l l} \: \: \: \: \: \: \: \: \: \: \: \: \: \: a {}^{2} - 7a - 18 \\ \\ \implies \: a {}^{2} - 9a + 2a - 18 \\ \\ \implies \: a(a - 9) + 2(a - 9) \\ \\ \implies \: (a + 2)(a - 9)\end{array}$

Hence the factor's are

$\large\boxed{\fcolorbox{black}{b}{(a + 2)(a - 9)}}$