The question states to find the solution of the following -

$\displaystyle

\frac{d^2y}{dx^2} - 2\frac{dy}{dx} + y = 2e^x

$

Ive got quite far, but when trying to find the value of 'C' i keep getting this:

C-2C+C=2

Which gives no value for C, any help will be appreciated, as i really want to finish this question..