Factorise:
$2 a^{3} + 4 a^{2}$

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Solution

$2 a^{3} + 4 a^{2}$

Highest common factor is $2 a^{2}$

$∴ 2 a^{3} + 4 a^{2}$

$= 2 a^{2} (a + 2)$ .

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