Find roots of polynomial $$ p(x) = x^6+5x^4+4x^2-1 $$
Answer
The roots of polynomial $ p(x) $ are:
$$ \begin{aligned}x_1 &= -0.4458\\[1 em]x_2 &= 0.4458\\[1 em]x_3 &= 1.1342i\\[1 em]x_4 &= -1.1342i\\[1 em]x_5 &= 1.9779i\\[1 em]x_6 &= -1.9779i \end{aligned} $$Explanation
Polynomial $ x^6+5x^4+4x^2-1 $ has no rational roots that can be found using Rational Root Test, so the roots were found using Newton method.
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