Find roots of polynomial $$ p(x) = 9x^4-24x^3+28x^2-16x+4 $$
Answer
The roots of polynomial $ p(x) $ are:
$$ \begin{aligned}x_1 &= 0.6667+0.4714i\\[1 em]x_2 &= 0.6667-0.4714i\\[1 em]x_3 &= 0.6667+0.4714i\\[1 em]x_4 &= 0.6667-0.4714i \end{aligned} $$Explanation
Polynomial $ 9x^4-24x^3+28x^2-16x+4 $ has no rational roots that can be found using Rational Root Test, so the roots were found using quartic formulas.
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