Answer
$$2\sqrt{5}\cdot10\sqrt{30}=100\sqrt{6}$$
Explanation
| $$ \begin{aligned}2\sqrt{5}\cdot10\sqrt{30}& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}100\sqrt{6}\end{aligned} $$ | |
| ① | $$ 20 \sqrt{150} =
20 \sqrt{ 5 ^2 \cdot 6 } =
20 \sqrt{ 5 ^2 } \, \sqrt{ 6 } =
20 \cdot 5 \sqrt{ 6 } =
100 \sqrt{ 6 } $$ |
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