$$3x^3+241x^2+330x+500 = 0$$
Answer
$$ \begin{matrix}x_1 = -78.96708 & x_2 = -0.68313+1.28215i & x_3 = -0.68313-1.28215i \end{matrix} $$
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