$$3x^3+3x^2-9x+9 = 0$$
Answer
$$ \begin{matrix}x_1 = -2.59867 & x_2 = 0.79934+0.71798i & x_3 = 0.79934-0.71798i \end{matrix} $$
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