Question
Answer
$$8\sqrt{80}(-3\sqrt{8})=-192\sqrt{10}$$
Explanation
| $$ \begin{aligned}8\sqrt{80}(-3\sqrt{8})& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-192\sqrt{10}\end{aligned} $$ | |
| ① | $$ - 24 \sqrt{640} =
-24 \sqrt{ 8 ^2 \cdot 10 } =
-24 \sqrt{ 8 ^2 } \, \sqrt{ 10 } =
-24 \cdot 8 \sqrt{ 10 } =
-192 \sqrt{ 10 } $$ |
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