# Please check my derivative if its correct

## Homework Statement

find a formula for the derivative of the function y = f(x) that satisfies the equation below.

## Homework Equations

$$\frac{1}{x^{2}+y^{2}}\$$ = 2xy

## The Attempt at a Solution

2x4f(x)+4x2f(x)2+2f(x)3
all over
-2f(x)-2x5-4x3f(x)-2xf(x)2

Am i doing it right? I have a feeling I may have misunderstood the question.