Question

what are the solution(s) of $x^{2}-4 = 0$?
$\bigcirc$ $x = -4$ or $x = 4$
$\bigcirc$ $x = -2$ or $x = 2$
$\bigcirc$ $x = 2$
$\bigcirc$ $x = 4$

Explanation:

Step1: Isolate the squared term

$x^2 - 4 + 4 = 0 + 4$
$x^2 = 4$

Step2: Take square root of both sides

$x = \pm\sqrt{4}$
$x = \pm2$

Answer:

x=-2 or x=2