$$2s^3+43s^2+38s+36 = 0$$
Answer
$$ \begin{matrix}s_1 = -20.62094 & s_2 = -0.43953+0.82445i & s_3 = -0.43953-0.82445i \end{matrix} $$
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