Question

Solve for x.x2−9=16Enter the solutions for the equation in the boxes.x = ___ or x = ___

Answer 1

`x^2-9=16`

start adding 9 on both sides

`\begin{gathered} x^2-9+9=16+9 \\ x^2=25 \end{gathered}`

take the square root on both sides

`\begin{gathered} \sqrt[]{x^2}=\sqrt[]{25} \\ x=\pm5 \end{gathered}`

the solutions of the equation are x=5 and x=-5.