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