Find roots of polynomial $$ p(x) = x^3-11x^2+63x-21 $$
Answer
The roots of polynomial $ p(x) $ are:
$$ \begin{aligned}x_1 &= 0.3546\\[1 em]x_2 &= 5.3227+5.5583i\\[1 em]x_3 &= 5.3227-5.5583i \end{aligned} $$Explanation
Polynomial $ x^3-11x^2+63x-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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