The roots of polynomial $ p(x) $ are:
$$ \begin{aligned}x_1 &= -0.4327\\[1 em]x_2 &= -22.7796\\[1 em]x_3 &= -1.3939+0.7016i\\[1 em]x_4 &= -1.3939-0.7016i \end{aligned} $$Polynomial $ x^4+26x^3+77x^2+84x+24 $ has no rational roots that can be found using Rational Root Test, so the roots were found using quartic formulas.