Hi. 1. The problem statement, all variables and given/known data Find the four roots of: https://www.physicsforums.com/attachment.php?attachmentid=39371&stc=1&d=1317233718 2. Relevant equations Calculus: p.6 Polynomials and Rational functions 3. The attempt at a solution Pretty much stuck on starting it. I can't really find a way to start factoring it.