Answer
$$-6x^2+3x-x+6=-6x^2+2x+6$$
Explanation
| $$ \begin{aligned}-6x^2+3x-x+6& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-6x^2+2x+6\end{aligned} $$ | |
| ① | Combine like terms: $$ -6x^2+ \color{blue}{3x} \color{blue}{-x} +6 = -6x^2+ \color{blue}{2x} +6 $$ |
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