# Implicit differentiation

1. Jun 17, 2008

### Ry122

(x^2-y^2)^2=(x+y)^3
I tried to use the chain rule on both sides but it didn't work because y needs to have the chain rule used on it explicitly and if i differentiate y explicitly then use the chain rule on everything i would be finding the 2nd derivative. So how do i differentiate this?

2. Jun 17, 2008

### D H

Staff Emeritus
For starters, what is the derivative with respect to x of $(x^2-y^2)^2$? Of $(x+y)^3$?

3. Jun 17, 2008

### Defennder

What does the question ask of you? That you find dy/dx as a function of x only, or simply to implicitly differentiate it?