The roots of polynomial $ p(x) $ are:
$$ \begin{aligned}x_1 &= 1.1422\\[1 em]x_2 &= -13.7516\\[1 em]x_3 &= 6.3048+11.6171i\\[1 em]x_4 &= 6.3048-11.6171i \end{aligned} $$Polynomial $ x^4+2401x-2744 $ has no rational roots that can be found using Rational Root Test, so the roots were found using quartic formulas.