Question
Answer
$$5-x^2+7x+4x^2=3x^2+7x+5$$
Explanation
| $$ \begin{aligned}5-x^2+7x+4x^2& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}3x^2+7x+5\end{aligned} $$ | |
| ① | Combine like terms: $$ 5 \color{blue}{-x^2} +7x+ \color{blue}{4x^2} = \color{blue}{3x^2} +7x+5 $$ |
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