#### Answer

x=±3

#### Work Step by Step

You add 9 to both sides. That gives you
$x^{2}=9$
Then you square root both sides to get the final answer of
$\sqrt x^{2}=\sqrt 9$
**** The root of 9 is 3 because 3 x 3 = 9
x=±3
The square root of any number always has two answers, therefore we can have positive or negative sign (±)