$$x^3+14x^2+61x-84 = 0$$
Answer
$$ \begin{matrix}x_1 = 1.0856 & x_2 = -7.5428+4.52582i & x_3 = -7.5428-4.52582i \end{matrix} $$
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