Question
Find roots of polynomial $$ p(x) = 10x-70 $$
Answer
The root of polynomial $ p(x) $ is:
$$ \begin{aligned}x &= 7 \end{aligned} $$Explanation
$$ \begin{aligned} 10x-70 & = 0 \\[1 em]
10 \cdot x & = 70 \\[1 em]
x & = \frac{ 70 }{ 10 } \\[1 em]
x & = \frac{ 70 : 10 }{ 10 : 10} \\[1 em]
x & = 7
\end{aligned} $$
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