The roots of polynomial $ p(x) $ are:
$$ \begin{aligned}x_1 &= 6.2939\\[1 em]x_2 &= 0.353+0.6569i\\[1 em]x_3 &= 0.353-0.6569i \end{aligned} $$Polynomial $ 2x^3-14x^2+10x-7 $ has no rational roots that can be found using Rational Root Test, so the roots were found using qubic formulas.