Factorize 4a2 – 12ab – C2 + 9b2
- 4a(a - 3b) + (3b - c)2
- (2a + 3b - c)(2a + 3b + c)
-
(2a - 3b + c)(2a - 3b - c)
- 4a(a - 3b) + (3b + c)
The correct answer is: C
Explanation
4a2 - 12ab - C2 + 9b2rearranges: (4a2 - 12ab + 9b2) - c2
(2a - 3b)(2a - 3b) - c2 = (2a - 3b)2 - c2
= (2a - 3b + c)(2a - 3b - c)