# Math Help - Solution by undetermined coefficients

1. ## Solution by undetermined coefficients

I got one more differential eq. which I am unsure of....

Solution by undetermined coefficients:
Find a (real) general solution. Which rule are you using?

$y^{''}-y^{'}-2y=3e^{2x}$

Thanks!

2. Originally Posted by ntfabolous
I got one more differential eq. which I am unsure of....

Solution by undetermined coefficients:
Find a (real) general solution. Which rule are you using?

$y^{''}-y^{'}-2y=3e^{2x}$

Thanks!
Since $y = a e^{2x}$ is part of the homogenous solution you must use a particular solution of the form $y_p = a x e^{2x}$.