Question

how to solve m squared +7=88

Answer 1

Explanation:

$m^2+7=88$

First we have to substract 7 from both sides of the equation:

$\begin{gathered} m^2+7-7=88-7 \\ m^2=81 \end{gathered}$

Now we have to take square root on both sides. The square root has two results, one negative and one positive:

$\begin{gathered} \sqrt[]{m^2}=\pm\sqrt[]{81} \\ m=\pm9 \end{gathered}$

Answer:

The solutions are:

• 9

,

• -9