Find roots of polynomial $$ p(x) = -2x^3+8x^2-5x+7 $$
Answer
The roots of polynomial $ p(x) $ are:
$$ \begin{aligned}x_1 &= 3.5745\\[1 em]x_2 &= 0.2127+0.9664i\\[1 em]x_3 &= 0.2127-0.9664i \end{aligned} $$Explanation
Polynomial $ -2x^3+8x^2-5x+7 $ has no rational roots that can be found using Rational Root Test, so the roots were found using qubic formulas.
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