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