The roots of polynomial $ p(x) $ are:
$$ \begin{aligned}x_1 &= 0.9017\\[1 em]x_2 &= 4.9804\\[1 em]x_3 &= -1.9411+1.2555i\\[1 em]x_4 &= -1.9411-1.2555i \end{aligned} $$Polynomial $ x^4-2x^3-13x^2-14x+24 $ has no rational roots that can be found using Rational Root Test, so the roots were found using quartic formulas.