$$-x^3+10x^2-20x+35 = 0$$
Answer
$$ \begin{matrix}x_1 = 8.05682 & x_2 = 0.97159+1.84395i & x_3 = 0.97159-1.84395i \end{matrix} $$
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