So this is also approaching negative five. And since the limit from the left-hand side is equal to the limit from the right-hand side, we can say, so these two things are equal. And because these two things are equal, we know that the limit of f of x as x approaches four is equal to five. Let's look at a few more examples. So let's ask ourselves the limit of f of x, now this is our new f of x depicted here, as x approaches eight. And let's approach eight from the left. As x approaches eight from values less than eight.