My math is a little rusty - so please bear with me if this is a stupid question. I know how to solve both homogenous and non-homogenous DEs However, I am not sure where a DE with a constant falls & how to solve it. For eg. y'' + 2y' + c = 0 (c is a constant). You cannot convert this into an algebraic equation in r like you do for regular homogenous DEs. So what's the method for solving this? If this is a different category of DEs (i.e. neither homo nor non-homo), then even giving me the name of this type of DE is good enough - I can google and find the method. An example of this type of DE is a bar loaded with a uniformly distributed load of f. The DE is AEu'' + f = 0 u -> deflection. f is a constant.