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 http://cwcsrv11.cwc.psu.edu/webwork2_files/tmp/equations/71/5a4f0007c2fd2947228eee9825b55d1.png [Broken] http://cwcsrv11.cwc.psu.edu/webwork2_files/tmp/equations/8d/8616ca1dd6ce230911485b98a57fa31.png [Broken] Here is my work, I submitted: 2*y^2+2*x^2-4 which was wrong. WOrk: http://img206.imageshack.us/img206/6632/lastscan3tp.jpg [Broken] Thanks!