Question
Factorise:
$3 x^5-48 x^3$

Answer

$3 x^5-48 x^3$
$=3 x^3\left\{x^2-16\right\}$
$=3 x^3\left\{(x)^2-16\right\}$
$=3 x^3\left\{(x)^2-(4)^2\right\}$
$=3 x^3(x+4)(x-4)$

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