# How do you simplify 3sqrt x * 3 sqrt x?

Jul 21, 2018

$9 x$

#### Explanation:

Since we are multiplying the same thing, we can rewrite this as

${\left(3 \sqrt{x}\right)}^{2}$, which is equal to ${3}^{2} \cdot {\left(\sqrt{x}\right)}^{2}$

This simplifies nicely to

$9 x$

$3 \cdot 3 \cdot \sqrt{x} \cdot \sqrt{x}$, which simplifies to
$9 x$