Question

$${ x }^{ 2 } -144=0$$

Answer

x=12,-12

Solution


Add \(144\) to both sides.
\[{x}^{2}=144\]
Take the square root of both sides.
\[x=\pm \sqrt{144}\]
Since \(12\times 12=144\), the square root of \(144\) is \(12\).
\[x=\pm 12\]