Question
Solve:
$ 12 m^2-27 $
$ 12 m^2-27 $
✓
Answer
$ 12 m^2-27 $
$ =3\left(4 m^2-9\right) $
$ =3\left[(2 m)^2-3^2\right] $
$ =3(2 m-3)(2 m+3) $
$ =3\left(4 m^2-9\right) $
$ =3\left[(2 m)^2-3^2\right] $
$ =3(2 m-3)(2 m+3) $
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