Question
Answer
$$-8\sqrt{81}=-72$$
Explanation
| $$ \begin{aligned}-8\sqrt{81}& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-8\cdot9 \xlongequal{ } \\[1 em] & \xlongequal{ }-72\end{aligned} $$ | |
| ① | The square root of $ 81 $ is $ 9 $. |
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