Find roots of polynomial $$ p(x) = 2x^4+5x^3-2x^2-11x-16 $$
Answer
The roots of polynomial $ p(x) $ are:
$$ \begin{aligned}x_1 &= 1.6877\\[1 em]x_2 &= -2.53\\[1 em]x_3 &= -0.8289+1.0893i\\[1 em]x_4 &= -0.8289-1.0893i \end{aligned} $$Explanation
Polynomial $ 2x^4+5x^3-2x^2-11x-16 $ has no rational roots that can be found using Rational Root Test, so the roots were found using quartic formulas.
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