Question

Which of the following are the factors of a┬▓-3a-40
(a-8)(a+5)
(a+8)(a+5)
(a-8)(a-5)
(a+8)(a-5)

Answer 1

$\huge \sf {\orange {\underline {\pink{\underline {A᭄ɴsᴡᴇʀ࿐ :−}}}}}$

${a}^{2} - 3a - 40 \: \: \: \bf(expanding) \\ {a}^{2} + 5a - 8a - 40 \\ a(a + 5) - 8(a + 5) \\ \bf Factors \: are \\ (a - 8)(a + 5)$

Answer 2

Answer:

a

2

−3a−40(expanding)

a

2

+5a−8a−40

a(a+5)−8(a+5)

Factorsare

(a−8)(a+5)