What is the domain of f(x)=x+3x2−5x+6f(x) = \frac{x + 3}{x^2 - 5x + 6}f(x)=x2−5x+6x+3?
All real numbers except x=2x = 2x=2 and x=3x = 3x=3
All real numbers except x=−2x = -2x=−2 and x=−3x = -3x=−3
All real numbers except x=2x = 2x=2
All real numbers