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