But let's say we don't fall into either of those situations. What if when we evaluate the function, we get zero over zero? And here is an example of that. Limit as x approaches negative one of this rational expression. And let's try to evaluate it. You get negative one squared, which is one, minus negative one, which is plus one, minus two, so you get zero in the numerator. And then in the denominator, you have negative one squared, which is one, minus two times negative one, so plus two minus three, which is equal to zero.