The roots of polynomial $ p(x) $ are:
$$ \begin{aligned}x_1 &= 2.3965\\[1 em]x_2 &= 0.0518+1.1177i\\[1 em]x_3 &= 0.0518-1.1177i \end{aligned} $$Polynomial $ 2x^3-5x^2+3x-6 $ has no rational roots that can be found using Rational Root Test, so the roots were found using qubic formulas.