$$-x^3+285x^2-6084x+14400 = 0$$
Answer
$$ \begin{matrix}x_1 = 2.70683 & x_2 = 20.30587 & x_3 = 261.9873 \end{matrix} $$
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