What is the inverse of f(x)=x2−4x+4f(x) = x^2 - 4x + 4f(x)=x2−4x+4 for x≥2x \geq 2x≥2?
2+x2 + \sqrt{x}2+x
2−x2 - \sqrt{x}2−x
x−2\sqrt{x} - 2x−2
x+2\sqrt{x+2}x+2