Answer :

choixongdong
7n^2 + 8n − 12
= (7n - 6)(n + 2)

cause
(7n - 6)(n + 2)
= 7n^2 - 6n + 14n - 12
= 7n^2 + 8n - 12

answer
D) (7n − 6)(n + 2)