Find roots of polynomial $$ p(x) = x^3-6x^2+6x+21 $$
Answer
The roots of polynomial $ p(x) $ are:
$$ \begin{aligned}x_1 &= -1.332\\[1 em]x_2 &= 3.666+1.5253i\\[1 em]x_3 &= 3.666-1.5253i \end{aligned} $$Explanation
Polynomial $ x^3-6x^2+6x+21 $ has no rational roots that can be found using Rational Root Test, so the roots were found using qubic formulas.
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