The roots of polynomial $ p(x) $ are:
$$ \begin{aligned}x_1 &= 0.4287\\[1 em]x_2 &= 0.7857+4.7654i\\[1 em]x_3 &= 0.7857-4.7654i \end{aligned} $$Polynomial $ -x^3+2x^2-24x+10 $ has no rational roots that can be found using Rational Root Test, so the roots were found using qubic formulas.