The roots of polynomial $ p(x) $ are:
$$ \begin{aligned}x_1 &= 1.8296\\[1 em]x_2 &= -2.286\\[1 em]x_3 &= 0.2282+1.5293i\\[1 em]x_4 &= 0.2282-1.5293i \end{aligned} $$Polynomial $ x^4-2x^2+3x-10 $ has no rational roots that can be found using Rational Root Test, so the roots were found using quartic formulas.