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