# How do you solve 9x^2=324?

Apr 14, 2016

$x = \pm 6$

#### Explanation:

To solve $9 {x}^{2} = 324$

Begin by dividing both sides by $9$ to isolate the term with $x$

$\frac{\cancel{9} {x}^{2}}{\cancel{9}} = \frac{324}{9}$

This gives us

${x}^{2} = 36$

Now square root both sides of the equation to
cancel the square of $x$

$\sqrt{{x}^{2}} = \sqrt{36}$

We get

$x = \pm 6$