$$x^4+4x^2-3x-1 = 0$$
Answer
$$ \begin{matrix}x_1 = -0.24923 & x_2 = 0.87144 & x_3 = -0.31111+2.1231i \\[1 em] x_4 = -0.31111-2.1231i & \\[1 em] \end{matrix} $$
Explanation
This polynomial has no rational roots that can be found using Rational Root Test.
Roots were found using quartic formulas
This page was created using
Equations Solver