For what values of xxx is 3x+1x2−5x+6\dfrac{3x + 1}{x^2 - 5x + 6}x2−5x+63x+1 undefined?
x=2x = 2x=2 and x=3x = 3x=3
x=−2x = -2x=−2 and x=−3x = -3x=−3
x=5x = 5x=5 and x=−6x = -6x=−6
x=−13x = -\frac{1}{3}x=−31