If f(x)=x2−4x+6f(x) = x^2 - 4x + 6f(x)=x2−4x+6 for x≥2x \geq 2x≥2, find the inverse function.
f^{-1}(x) = 2 - \sqrt{x-2}
f^{-1}(x) = 2 + \sqrt{x-2}
f^{-1}(x) = \sqrt{x-2} + 2
f^{-1}(x) = \sqrt{x+2} - 2