Answer
$$2(2x^2+6x+2)=4x^2+12x+4$$
Explanation
| $$ \begin{aligned}2(2x^2+6x+2)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}4x^2+12x+4\end{aligned} $$ | |
| ① | Multiply $ \color{blue}{2} $ by $ \left( 2x^2+6x+2\right) $ $$ \color{blue}{2} \cdot \left( 2x^2+6x+2\right) = 4x^2+12x+4 $$ |
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