Question
Answer
$$7-4x^2+6+8x^2=4x^2+13$$
Explanation
| $$ \begin{aligned}7-4x^2+6+8x^2& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}4x^2+13\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{7} \color{red}{-4x^2} + \color{blue}{6} + \color{red}{8x^2} = \color{red}{4x^2} + \color{blue}{13} $$ |
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