The roots of polynomial $ p(x) $ are:
$$ \begin{aligned}x_1 &= -0.9663\\[1 em]x_2 &= -2.5226\\[1 em]x_3 &= -20.511 \end{aligned} $$Polynomial $ x^3+24x^2+74x+50 $ has no rational roots that can be found using Rational Root Test, so the roots were found using qubic formulas.