I am a bit confused on how to solve the following using the method of undetermined coefficients:
equation: y'' + y - 2y = x + sin2x
So what i have done so far is:
roots are 1, -2 so
Yc = Ae^(x) + Be^(-2x)
But from the homogenious equation above i dont know how to go on. can someone help me solve this?