Question
Answer
$$7x^2+15+2=7x^2+17$$
Explanation
| $$ \begin{aligned}7x^2+15+2& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}7x^2+17\end{aligned} $$ | |
| ① | Combine like terms: $$ 7x^2+ \color{blue}{15} + \color{blue}{2} = 7x^2+ \color{blue}{17} $$ |
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