The roots of polynomial $ p(x) $ are:
$$ \begin{aligned}x_1 &= -0.9661\\[1 em]x_2 &= -1.664+0.7831i\\[1 em]x_3 &= -1.664-0.7831i\\[1 em]x_4 &= -4.8529+3.6295i\\[1 em]x_5 &= -4.8529-3.6295i \end{aligned} $$Polynomial $ x^5+14x^4+85x^3+225x^2+274x+120 $ has no rational roots that can be found using Rational Root Test, so the roots were found using Newton method.