Question
Answer
$$3x^2+18-6=3x^2+12$$
Explanation
| $$ \begin{aligned}3x^2+18-6& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}3x^2+12\end{aligned} $$ | |
| ① | Combine like terms: $$ 3x^2+ \color{blue}{18} \color{blue}{-6} = 3x^2+ \color{blue}{12} $$ |
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