Answer
$$7x^2-2x+3x^2+5x=10x^2+3x$$
Explanation
| $$ \begin{aligned}7x^2-2x+3x^2+5x& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}10x^2+3x\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{7x^2} \color{red}{-2x} + \color{blue}{3x^2} + \color{red}{5x} = \color{blue}{10x^2} + \color{red}{3x} $$ |
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