For f(x)=x2−5x+6x2−4f(x) = \frac{x^2 - 5x + 6}{x^2 - 4}f(x)=x2−4x2−5x+6, identify all discontinuities and classify them.
Removable at x=2x=2x=2, infinite at x=−2x=-2x=−2
Jump at x=2x=2x=2 and x=−2x=-2x=−2
Infinite at both x=2x=2x=2 and x=−2x=-2x=−2
Removable at x=2x=2x=2 and x=−2x=-2x=−2