The roots of polynomial $ p(x) $ are:
$$ \begin{aligned}x_1 &= 2.4671\\[1 em]x_2 &= 0.0165+1.191i\\[1 em]x_3 &= 0.0165-1.191i \end{aligned} $$Polynomial $ 2x^3-5x^2+3x-7 $ has no rational roots that can be found using Rational Root Test, so the roots were found using qubic formulas.