The roots of polynomial $ p(x) $ are:
$$ \begin{aligned}x_1 &= -0.8981\\[1 em]x_2 &= -2.5509+2.7222i\\[1 em]x_3 &= -2.5509-2.7222i \end{aligned} $$Polynomial $ 4x^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.