Question

(factories the following) 1-18a-63a²​

Answer 1

$\huge\colorbox{blue}{Question = } \\ 1 - 18a - 63 {a}^{2} \\ \\ \huge\colorbox{green}{answer} \\ \\ = 1 - (21 - 3)a - 63 {a}^{2} \\ \\ = 1 - 21a + 3a - 63 {a}^{2} \\ \\ = 1(1 - 21a) + 3a(1 - 21a) \\ \\ = (1 - 21a)(1 + 3a) \\ \\ your \: answer \\ hope \: its \: help \: you \:$

Answer 2

Answer:

1−18a−63a^2

Step-by-step explanation:

Question

1−18a−63a^2

Answer

=1−(21−3)a−63a^2

=1−21a+3a−63a^2

=1(1−21a)+3a(1−21a)

=(1−21a)(1+3a)