152+202=c2

Rewrite the equation as c2=152+202.

c2=152+202

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

c=±152+202

Simplify the right side of the equation.

Raise 15 to the power of 2.

c=±225+202

Raise 20 to the power of 2.

c=±225+400

Add 225 and 400.

c=±625

Rewrite 625 as 252.

c=±252

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

c=±25

c=±25

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.

c=25

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

c=-25

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

c=25,-25

c=25,-25

c=25,-25

Solve for c 15^2+20^2=c^2