Question
Answer
$$2x^2-3x+1+7x^2+10x+8=9x^2+7x+9$$
Explanation
| $$ \begin{aligned}2x^2-3x+1+7x^2+10x+8& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}9x^2+7x+9\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{2x^2} \color{red}{-3x} + \color{green}{1} + \color{blue}{7x^2} + \color{red}{10x} + \color{green}{8} = \color{blue}{9x^2} + \color{red}{7x} + \color{green}{9} $$ |
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