The roots of polynomial $ p(x) $ are:
$$ \begin{aligned}x_1 &= 1.1236\\[1 em]x_2 &= -0.8322\\[1 em]x_3 &= 3.2086 \end{aligned} $$Polynomial $ 2x^3-7x^2+6 $ has no rational roots that can be found using Rational Root Test, so the roots were found using qubic formulas.