And let's see if we can evaluate this limit, or let's see what the limit is as we approach from the left-hand side and the right-hand side. And if they're approaching the same thing, then we know that this, and that same thing that they're approaching is the limit. So let's first think about the limit as x approaches three from the left-hand side. So it's over x minus three, and we have f of x minus nine. But as we approach from the left-hand side, this is f of x. As x is less than three, f of x is equal to x squared. So this would be, instead of f of x minus nine, I'll write x squared minus nine.