What are the two intersection points? Well, over here, once again, we could have defined the interval someplace else, like between there and there, and we would have gotten a different shape, but the points that we care about, the way we visualize it is between x is equal to zero, x is equal to zero, and x is equal to one. That's where these two things intersect. We saw that in the last video. Of pi, pi, times, what's f of x squared? f of x squared, square root of x squared is just x, minus g of x squared. G of x is x, that squared is x squared, and then we multiply times dx.