Question

12. За
$3a ^2 - 1- 2а$
- 1- 2а​

Answer 1

Step-by-step explanation:

$\huge {\mathbb ♡{\orange{}\green{Ans}\pink{wer}\blue{!}}}♡$

3a²-2a-1

=3a²-3a+a-1

=3a(a-1)+(a-1)

=(3a+1)(a-1)