And to do this, I'm going to use the chain rule. And the chain rule comes into play anytime your function can be used as a composition of more than one function. And that might not seem obvious right now. But it will hopefully maybe by the end of this video or the next one. Now, what I want to do is a little bit of a thought experiment. If I were to ask you, what is the derivative with respect to x, if I were to supply the derivative operator to x squared with respect to x, what do I get? Well, this gives me 2x.