$$2x^3+33x^2+180x+300 = 0$$
Answer
$$ \begin{matrix}x_1 = -3.08641 & x_2 = -6.7068+1.90238i & x_3 = -6.7068-1.90238i \end{matrix} $$
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