So let's go back up here just to continue our simplification solving for dy dx. Well, to solve for dy dx, we just have to divide both sides by x over 2 times the square root of y. So we're left with dy dx is equal to, or dividing both sides by this is the same thing as multiplying by the reciprocal of this, is equal to 2 times the square root of y over x, over my yellow x, times the negative square root of y. Well, what's this going to simplify to? This is going to be equal to the square root of y times the square root of y is just y. The negative times the 2, you get negative 2. So you get negative 2y over x is equal to the derivative of y with respect to x.