And on the right-hand side, right over here, the derivative with respect to x of this constant, that's just going to be equal to 0. So what does this simplify to? Well, the derivative with respect to x of x is just 1. So we're just going to be left, this simplifies to 1, so we're just going to be left with the square root of y right over here. So we're just going to be, this is going to simplify to a square root of y. And what does this over here simplify to? Well, the derivative with respect to x of the square root of y, here we want to apply the chain rule, so let me make it clear.