Question
Answer
$$s(s^4+6s^3+11s^2+6s)=s^5+6s^4+11s^3+6s^2$$
Explanation
| $$ \begin{aligned}s(s^4+6s^3+11s^2+6s)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}s^5+6s^4+11s^3+6s^2\end{aligned} $$ | |
| ① | Multiply $ \color{blue}{s} $ by $ \left( s^4+6s^3+11s^2+6s\right) $ $$ \color{blue}{s} \cdot \left( s^4+6s^3+11s^2+6s\right) = s^5+6s^4+11s^3+6s^2 $$ |
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