$$w^3-3w-26 = 0$$
Answer
$$ \begin{matrix}w_1 = 3.29875 & w_2 = -1.64938+2.27186i & w_3 = -1.64938-2.27186i \end{matrix} $$
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