Which value of xxx is excluded from the domain of f(x)=x+2x2−5x+6f(x) = \frac{x+2}{x^2-5x+6}f(x)=x2−5x+6x+2?
2,32, 32,3
−2,3-2, 3−2,3
2,−32, -32,−3
−2,−3-2, -3−2,−3