[PLAIN]http://www.tempneff.com/jailtime/differential%20equations/HDE.PNG [Broken] I learned how to solve homogeneous DE's from youtube videos. This presented a problem when during my last test, a question stated that i should show a DE to be homogeneous. The way I learned was different then the rest of the class and I missed the points. But it works. I want to find some documentation so that I may challenge my professors grading. But....I don't have anything other than these videos. http://www.wikihow.com/Solve-Differential-Equations Specifically, i want to identify the test used in these videos that changes the DE to terms of F(x\y).