### Home > A2C > Chapter Ch9 > Lesson 9.3.2 > Problem 9-153

9-153.

First isolate the radical.

Square both sides.

Set the equation equal to 0.

Factor the equation.

*x* = *x*^{2} − 4*x* + 4

*x*^{2} − 5*x* + 4 = 0

(*x* − 4)(*x* − 1)

*x* = 4

You will need to square twice.