$$3x^3+5x^2-x+3 = 0$$
Answer
$$ \begin{matrix}x_1 = -2.06316 & x_2 = 0.19825+0.66738i & x_3 = 0.19825-0.66738i \end{matrix} $$
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