# How do you simplify 5sqrt(9a^3)-6asqrta?

Jun 13, 2016

$= 9 a \sqrt{a}$

#### Explanation:

We could see the first term as:
$5 \sqrt{9 {a}^{2} \times a} - 6 a \sqrt{a}$
$= 5 \times 3 a \sqrt{a} - 6 a \sqrt{a} \text{ take out a common factor}$
$= 3 a \sqrt{a} \left(5 - 2\right)$

$= 9 a \sqrt{a}$