ok so the problem is

xy'' - 4y' = x^4

im getting a different answer from the book and was wondering if someone could check my work.

Yc= c1 + c2x^5

W = 5x^4

W1 = -x^9

W2 = x^4

it seems that the book is using f(x) = x^3???

i thought the f(x) function would be x^4?

thanks in advance....