Find roots of polynomial $$ p(x) = 10x^3+20x^2-10x+15 $$
Answer
The roots of polynomial $ p(x) $ are:
$$ \begin{aligned}x_1 &= -2.6049\\[1 em]x_2 &= 0.3025+0.696i\\[1 em]x_3 &= 0.3025-0.696i \end{aligned} $$Explanation
Polynomial $ 10x^3+20x^2-10x+15 $ has no rational roots that can be found using Rational Root Test, so the roots were found using qubic formulas.
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