The roots of polynomial $ p(x) $ are:
$$ \begin{aligned}x_1 &= 0.2887\\[1 em]x_2 &= -1.1371\\[1 em]x_3 &= 1.8157\\[1 em]x_4 &= 5.0326 \end{aligned} $$Polynomial $ x^4-6x^3+3x^2+10x-3 $ has no rational roots that can be found using Rational Root Test, so the roots were found using quartic formulas.