1. The problem statement, all variables and given/known data Solve (x^2 + y^2 - y)dx + x dy = 0 when x > 0, y > 0. 2. Relevant equations (x^2 + y^2 - y)dx + x dy = 0 3. The attempt at a solution dy/dx = - (x^2 + y^2 - y) / x That seems like a tricky one. Can I make it a second-order diff. eq.? Well, with the topic we have had about vectorfields I can backwards engineer it into F(x,y) = (x^2 + y^2 - y)i + (-x)j But that dosn't make much sense to me.