Question
Answer
$$3a(-7a+2)=-21a^2+6a$$
Explanation
| $$ \begin{aligned}3a(-7a+2)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-21a^2+6a\end{aligned} $$ | |
| ① | Multiply $ \color{blue}{3a} $ by $ \left( -7a+2\right) $ $$ \color{blue}{3a} \cdot \left( -7a+2\right) = -21a^2+6a $$ |
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