Factorised
$3 a^{3} + 24 b^{3}$

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Solution

$\begin{matrix} 3 a^{3} + 24 b^{3} \Rightarrow 3 {a^{3} + {(2 b)}^{3}} [a^{3} + b^{3} = (a + b) (a^{2} - a b + b^{2})] \Rightarrow 3 (a + 2 b) (a^{2} - 2 a b + 4 b^{2}) \end{matrix}$

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