What about y is equal to x to the fourth power? Pause this video and see if this is a solution to our original differential equation. Well, we're going to do the same thing. What's the derivative of y with respect to x? This is equal to, just using the power rule, four x to the third power. And so what we have to test is, is four x to the third power, that's the derivative of y with respect to x, equal to four times y. Instead of writing a y, I'm gonna write it all in terms of x.