Is my question and its only asking for yp(x).
So I know that to solve for that I use the method of undetermined coefficients solving for A, B and C.
I got up to the point of 9Ax^(2)+(-12A-9B)x+(2A+6B+9C) = 2.5e^(3x)...
Then I realized, what is 2.5e^(3x) considered?
I need to make it equal to x^(2) or x.
ie. 9A = 2.5e^(3x) then I'll solve using that.
I'm thinking its a x variable? But then what do I do with that?