But how do we find the derivative of their product? Well as you can imagine, this might involve the product rule. And let me just write down the product rule generally first. So if we would take the derivative with respect to x of the first expression in terms of x. So this is, we could call this u of x u of x times another expression that involves x. So u times v of x. This is going to be equal to, and I'm color coding it so we can really keep track of things.