But this isn't the only way to do it. We could look at the left endpoint or the right endpoint, and we do that in other videos. And then if we wanna do it just for kicks here, let's just do that really fast. So if we wanna look at the left endpoints of our interval, well, here our left endpoint is negative one. Negative one squared plus one is two. Two times one gives us two. And then here, the left part of this interval is x equals zero.