Well, we know what f of y and g of y are. Really, the trickiest part is is figuring out these points of intersection. So let's think about where these two curves intersect. They are both equal to x, so we can set these two y expressions equal to each other. So we know that negative, let me do it in that other color. So we know that negative y squared plus three y plus 11 is going to be equal to this, is going to be equal to y squared plus y minus one. So let's just subtract all of this from both sides so that on the right side we have a zero and on the left side we just have a quadratic.