Identify the number of solutions to the quadratic equation 4x2 - 4x plus 1 equals 0?

4x2 - 4x + 1 = 0

=> (2x - 1)(2x - 1) = 0

=> (2x - 1)2 = 0

There is one solution: x = 1/2.

It is a repeated root of the equation.