And the derivative of y with respect to x, well, we don't know what that is, so we're just gonna leave that as times the derivative of y times the derivative of y with respect to x. So let's just write this down over here. So what we have is two x, two x plus, two x plus derivative of something squared with respect to that something is two times the something. In this case, the something is y, so two times y, and then times the derivative of y, the derivative of y with respect to x. And this is all going to be equal to, all going to be equal to zero. Now that was interesting. Now we have an equation that has the derivative of y with respect to x in it.