# How do you solve 4a^2-144=0?

Mar 26, 2016

$a = - 6 , 6$

#### Explanation:

Add $144$ to both sides of the equation.

$4 {a}^{2} = 144$

Divide both sides of the equation by $4$.

${a}^{2} = 36$

Take the square root of both sides. Recall that both the positive and negative roots should be taken.

$a = \pm \sqrt{36} = \pm 6$