Tick (✓) the correct answer:
x3 − 144x = ?
(a) x(x − 12)2
(b) x(x + 12)2(c) x(x − 12)(x + 12)
(d) none of these
(c) x(x − 12)(x + 12)
$x^{3}-144 x$
$=x\left(x^{2}-144\right)$
$=x(x-12)(x+12)$
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