Question 115518
3A^2-36A+81=0
(3A-9)(A-9)=0 ANSWER.
5X^2-45=0
5(X^2-9)=0
5(X+3)(X-3)=0 ANSWER.
2A^2-A-21=0
2A-7)(A+3)=0 ANSWER.
I'LL LEAVE THE REST FOR YOU TO PRACTICE WITH.