I've only recently started learning how to work with differential equations. I'm about to start on linear 2nd order DE, but I wondered - what approach is taken to solve equations of the form:
$ay'' + by' +cy = d$
where $a$,$b$,$c$,$d$ and $y$ are all functions of $x$?
I'm sure I'll get to that point soon, but I just thought I'd throw out an enquiry. It was a very useful question to ask when I started learning about first orders linears.