My=Nx if equation is exact, if not, I can make it exact (I hope) by finding an integrating factor. The problem is I can't get the integrating factor to be a function of x or y only.
The Attempt at a Solution
Let stuff in front of dx=M
Let stuff in front of dy=N
First try (My-Nx)/N=(16y3-22x2y)/4xy3
Not a function of x only.
Not a function of y only.
Am I using the wrong method to solve this question? I don't see any other way to go about it rather than turning this into an exact equation. Why can't I find an integrating factor that has a pure x or y expression?