Pull terms out from under the radical, assuming positive real numbers.

Raise to the power of .

Subtract from both sides of the equation.

Subtract from .

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.

Rewrite as .

Factor out of .

Rewrite as .

Pull terms out from under the radical.

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 b square root of 4^2+b^2=4^2