I have to find the general solution of this eq : 

> 
> $$y''-4y'+5y=e^{2s} $$
> 
> 
> 

I have found the general solution of the homogeneous part of this eq. 

> 
> $$Y\_h= e^{2s} ( C\_1 \cos s - C\_2 \sin s ) $$
> 
> 
> 

I hope it's correct. Well, my problem comes at the particular solution. I don't understand how to find it. 

Can anyone help me? Thank you !