Question
Find roots of polynomial $$ p(x) = -2x+4 $$
Answer
The root of polynomial $ p(x) $ is:
$$ \begin{aligned}x &= 2 \end{aligned} $$Explanation
$$ \begin{aligned} -2x+4 & = 0 \\[1 em]
-2 \cdot x & = -4 \\[1 em]
x & = - \frac{ 4 }{ -2 } \\[1 em]
x & = - \frac{ 4 : 2 }{ -2 : 2} \\[1 em]
x & = 2
\end{aligned} $$
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