# Confused on what u do next with an exact equation, Diff EQ

1. Jan 30, 2006

### mr_coffee

Hello everyone. We just started working with exact equations and i'm confused on what I do next! here is the problem:
Use the "mixed partials" check to see if the following differential equation is exact.
If it is exact find a function F(x,y) whose level curves are solutions to the differential equation

Here is my work, I submitted:
2*y^2+2*x^2-4 which was wrong.

WOrk:

Thanks!

2. Jan 30, 2006

### mathmike

your int of 2xy^2 + 4y is incorrect

3. Jan 31, 2006

### HallsofIvy

Staff Emeritus
And what, again, is $\int (2xy^2+ 4y)dx$?

Did you forget that you were integrating, not differentiating?

4. Jan 31, 2006

### mr_coffee

Thanks everyone! yeah I don't know what i was thinking! I got:

Which is right! weee!