Find roots of polynomial $$ p(x) = -5x^2+15x+20 $$
Answer
The roots of polynomial $ p(x) $ are:
$$ \begin{aligned}x_1 &= 4\\[1 em]x_2 &= -1 \end{aligned} $$Explanation
The solutions of $ -5x^2+15x+20 = 0 $ are: $ x = -1 ~ \text{and} ~ x = 4$.
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