# Math Help - Non-exact differential equation help

1. ## Non-exact differential equation help

Hey everyone,

I have this problem $y(x-y-2)dx + x(y-x+4)dy = 0$

I get an integration factor of $y^3$ but when I multiply both equations by this they are not exact, what am I doing wrong?

Thanks

2. ## Re: Non-exact differential equation help

Check your sign. I believe it should be $\frac{1}{y^3}$.

3. ## Re: Non-exact differential equation help

I got it. It was my sign. I appreciate your help.