Identify the excluded values for frac2x−4x2−4x+4\\frac{2x - 4}{x^2 - 4x + 4}frac2x−4x2−4x+4.
x=2x = 2x=2 only
x=pm2x = \\pm 2x=pm2
x=4x = 4x=4
x=−2x = -2x=−2 only