Answer
$$-7x^2+3x-10-6x^2-10x+3=-13x^2-7x-7$$
Explanation
| $$ \begin{aligned}-7x^2+3x-10-6x^2-10x+3& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-13x^2-7x-7\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{-7x^2} + \color{red}{3x} \color{green}{-10} \color{blue}{-6x^2} \color{red}{-10x} + \color{green}{3} = \color{blue}{-13x^2} \color{red}{-7x} \color{green}{-7} $$ |
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