Determine where f(x)=x2−4x2−x−2f(x) = \frac{x^2 - 4}{x^2 - x - 2}f(x)=x2−x−2x2−4 has removable and non-removable discontinuities.
Removable at x=2x=2x=2; non-removable (infinite) at x=−1x=-1x=−1
Non-removable at both x=2x=2x=2 and x=−1x=-1x=−1
Non-removable at x=2x=2x=2; removable at x=−1x=-1x=−1
Removable at both x=2x=2x=2 and x=−1x=-1x=−1