# How do you factor completely 15a^3 + 40?

Aug 10, 2016

$5 \left(3 {a}^{3} + 8\right)$

#### Explanation:

Remove a common factor from the 2 terms.

The only common factor is between the numbers 15 and 40.

Which is 5

$\Rightarrow 5 \left(3 {a}^{3} + 8\right) \text{ is factorised completely}$