1. The problem statement, all variables and given/known data x4 - 4(x3) + 3(x2) -2x +1 = 0 2. Relevant equations Rational Root Theorem, q/p 3. The attempt at a solution Hello everyone. Today, I've learnt the rational root theorem( it's a bit late, isn't it? :( ) and thus wanted to see how it works. According to the rational root theorem the roots must be ± 1, but wolframalpha says the roots are x ≈ 0.672378 and x ≈ 3.23402. ( It also says there're also complex roots, but it's not what I'm looking for). What am I doing wrong?