Question
Answer
$$-7a^2b-2a^2b=-9a^2b$$
Explanation
| $$ \begin{aligned}-7a^2b-2a^2b& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-9a^2b\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{-7a^2b} \color{blue}{-2a^2b} = \color{blue}{-9a^2b} $$ |
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