Differential equations - undetermined coefficients
I have a quiz tomorrow and i'm not going to be able to sleep unless I understand the solution to this question. it's long, I kinda feel bad even asking (Doh)
Anyway the question is:
Use method of undetermined coefficients to find the particular solution to
y''' - 3y'' + 4y = e^2x
I took my yp = x^2 * Ae^2x
I multipllied by x^2 because of the double roots ( I got 2,2,-1 for roots)
Thanks so much to anyone who can help me... I know its a long one.