Take the square root of each side of the equation to set up the solution for

Remove the perfect root factor under the radical to solve for .

First, use the positive value of the to find the first solution.

Subtract from both sides of the equation.

Next, use the negative value of the to find the second solution.

Subtract from both sides of the equation.

The complete solution is the result of both the positive and negative portions of the solution.

The result can be shown in multiple forms.

Exact Form:

Decimal Form:

Solve for z (z+9)^2=13