The roots of polynomial $ p(x) $ are:
$$ \begin{aligned}x_1 &= 0.6287\\[1 em]x_2 &= 1.52\\[1 em]x_3 &= -0.2743+0.6693i\\[1 em]x_4 &= -0.2743-0.6693i \end{aligned} $$Polynomial $ 10x^4-16x^3+3x^2-6x+5 $ has no rational roots that can be found using Rational Root Test, so the roots were found using quartic formulas.