Question
Answer
$$20+40x\cdot20x=800x^2+20$$
Explanation
| $$ \begin{aligned}20+40x\cdot20x& \xlongequal{ }20+800x^2 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}800x^2+20\end{aligned} $$ | |
| ① | Combine like terms: $$ 800x^2+20 = 800x^2+20 $$ |
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