Question
Find roots of polynomial $$ p(x) = -5+20x $$
Answer
The root of polynomial $ p(x) $ is:
$$ \begin{aligned}x &= \dfrac{ 1 }{ 4 } \end{aligned} $$Explanation
$$ \begin{aligned} -5+20x & = 0 \\[1 em]
20 \cdot x & = 5 \\[1 em]
x & = \frac{ 5 }{ 20 } \\[1 em]
x & = \frac{ 5 : 5 }{ 20 : 5} \\[1 em]
x & = \frac{ 1 }{ 4 }
\end{aligned} $$
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