1. The problem statement, all variables and given/known data I'm trying to factorize a characteristic equation from my ODEs class, and I am having a problem when it comes to 4th, 5th or higher order differential equations. Say this one: r5-3r4+3r3-3r2+2r=0 2. Relevant equations 3. The attempt at a solution Tried a lot of things but couldn't reach the result.