Question
Find roots of polynomial $$ p(x) = 4x-12 $$
Answer
The root of polynomial $ p(x) $ is:
$$ \begin{aligned}x &= 3 \end{aligned} $$Explanation
$$ \begin{aligned} 4x-12 & = 0 \\[1 em]
4 \cdot x & = 12 \\[1 em]
x & = \frac{ 12 }{ 4 } \\[1 em]
x & = \frac{ 12 : 4 }{ 4 : 4} \\[1 em]
x & = 3
\end{aligned} $$
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