Find roots of polynomial $$ p(x) = 6x^7+20x^6+4x^5+2x^4+7x^3+9x^2+x+4 $$
Answer
The roots of polynomial $ p(x) $ are:
$$ \begin{aligned}x_1 &= -3.1322\\[1 em]x_2 &= 0.0403+0.5957i\\[1 em]x_3 &= 0.0403-0.5957i\\[1 em]x_4 &= -0.7532+0.5022i\\[1 em]x_5 &= -0.7532-0.5022i\\[1 em]x_6 &= 0.6124+0.5946i\\[1 em]x_7 &= 0.6124-0.5946i \end{aligned} $$Explanation
Polynomial $ 6x^7+20x^6+4x^5+2x^4+7x^3+9x^2+x+4 $ has no rational roots that can be found using Rational Root Test, so the roots were found using Newton method.
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