The roots of polynomial $ p(x) $ are:
$$ \begin{aligned}x_1 &= 0.7333\\[1 em]x_2 &= 6.5551\\[1 em]x_3 &= -3.6442+0.1831i\\[1 em]x_4 &= -3.6442-0.1831i \end{aligned} $$Polynomial $ x^4-35x^2-62x+64 $ has no rational roots that can be found using Rational Root Test, so the roots were found using quartic formulas.