$$4x^3+5x^2-3x+1 = 0$$
Answer
$$ \begin{matrix}x_1 = -1.75763 & x_2 = 0.25382+0.27895i & x_3 = 0.25382-0.27895i \end{matrix} $$
Explanation
This polynomial has no rational roots that can be found using Rational Root Test.
Roots were found using qubic formulas.
This page was created using
Polynomial Equations Solver