# Math Help - Help solving second order non homogeneous equation

1. ## Help solving second order non homogeneous equation

http://i.imgur.com/NwWlZ.png

lambda is just a constant

there's no context given for the problem, it's due tomorrow and neither my TA nor professor has office hours before the due time. help please?

2. ## Re: Help solving second order non homogeneous equation

Have thought of a change of variables

$T = T_{\infty} + S$?