Question

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

Answer 1

`a=-6,6`

Explanation:

Add `144` to both sides of the equation.

`4a^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=pmsqrt36=pm6`