The roots of polynomial $ p(x) $ are:
$$ \begin{aligned}x_1 &= 2.4038\\[1 em]x_2 &= -0.0519+0.4969i\\[1 em]x_3 &= -0.0519-0.4969i \end{aligned} $$Polynomial $ 10x^3-23x^2-6 $ has no rational roots that can be found using Rational Root Test, so the roots were found using qubic formulas.