1. The problem statement, all variables and given/known data I need to factor this: u - u^6 -u^3 +1 = 0 2. Relevant equations 3. The attempt at a solution I know that (u +1) and (u-1) are roots.. but not sure what to do now without long division.. Do I put them into multiples like (u^3 + 1)(u^3 -1) ??