Apply your methods and see whether you can arrive at the answer from Wolframalpha.com:
http://www.wolframalpha.com/input/?i=y%22%2By%27%3Dx%2Bsin%282x%29
Find y particular of the ODE
y"+y'=x+sin(2x)
1 answer
y"+y'=x+sin(2x)
1 answer