Tick (✓) the correct answer:
(12m2 − 27) = ?
(a) (2m − 3)(3m − 9)
(b) 3(2m − 9)(3m − 1)
(c) 3(2m − 3)(2m + 3)
(d) none of these
$12 m^{2}-27$
$=3\left(4 m^{2}-9\right)$
$=3(2 m-3)(2 m+3)$
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