Question
Solve:
$ (2 a-b)^2-16 c^2 $
$ (2 a-b)^2-16 c^2 $
✓
Answer
$ (2 a-b)^2-16 c^2 $
$ =(2 a-b)^2-(4 c)^2 $
$ =[(2 a-b)-4 c][(2 a-b)+4 c] $
$ =(2 a-b-4 c)(2 a-b+4 c) $
$ =(2 a-b)^2-(4 c)^2 $
$ =[(2 a-b)-4 c][(2 a-b)+4 c] $
$ =(2 a-b-4 c)(2 a-b+4 c) $
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