Rewrite the equation as .

Take the square root of both sides of the equation to eliminate the exponent on the left side.

Simplify the right side of the equation.

Raise to the power of .

Raise to the power of .

Add and .

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

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

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

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 c 0.72^2+0.21^2=c^2