Question
Answer
$$4(5x^2+10)=20x^2+40$$
Explanation
| $$ \begin{aligned}4(5x^2+10)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}20x^2+40\end{aligned} $$ | |
| ① | Multiply $ \color{blue}{4} $ by $ \left( 5x^2+10\right) $ $$ \color{blue}{4} \cdot \left( 5x^2+10\right) = 20x^2+40 $$ |
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