What are the excluded values for x2−4x2+x−2\dfrac{x^2 - 4}{x^2 + x - 2}x2+x−2x2−4?
x=1x = 1x=1 and x=−2x = -2x=−2
x=2x = 2x=2 and x=−2x = -2x=−2
x=−1x = -1x=−1 and x=2x = 2x=2
x=1x = 1x=1 only