- #1
shortwave
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Homework Statement
Find the PDE for this general solution:
U(x,y) = Phi(x+y) + Psi(x-2y)
Homework Equations
The Attempt at a Solution
I let my xi = x+y and my eta = x-2y and found that both roots are {-1,1/2}. From that I multiplied: (dy/dx - root1)*(dy/dx - root2) to give me the function that will give me my little a,b,c for the quadratic equation. But now I'm stuck and am not sure where to go. Any hints or ideas would be appreciated.