Question: 2nd Order differential equation

Hey all new to Maplesoft my question is this;

say I want it to calculate a general solution for a second order linear homogeneous differential but wanna state the first solution first like this is one particular solution to the equation from it work out the second particular and therefore create the general solution for all values of x

or with less jargon an equation like this y''+y' + y = 0

y1 = x

y2 = something else
so y = C1y1 + C2y2
 
I want to define y1 and have it calculate y2 and thus y.
 
Thanks in advance for any help.
Please Wait...