The roots of polynomial $ p(x) $ are:
$$ \begin{aligned}x_1 &= -0.8483\\[1 em]x_2 &= -0.3259+1.6855i\\[1 em]x_3 &= -0.3259-1.6855i \end{aligned} $$Polynomial $ 2x^3+3x^2+7x+5 $ has no rational roots that can be found using Rational Root Test, so the roots were found using qubic formulas.