Find roots of polynomial $$ p(x) = s^3+2s^2-s-1 $$
Answer
The roots of polynomial $ p(s) $ are:
$$ \begin{aligned}s_1 &= 0.8019\\[1 em]s_2 &= -0.555\\[1 em]s_3 &= -2.247 \end{aligned} $$Explanation
Polynomial $ s^3+2s^2-s-1 $ has no rational roots that can be found using Rational Root Test, so the roots were found using qubic formulas.
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