Question
Answer
$$5\sqrt{10}\cdot4\sqrt{50}=200\sqrt{5}$$
Explanation
| $$ \begin{aligned}5\sqrt{10}\cdot4\sqrt{50}& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}200\sqrt{5}\end{aligned} $$ | |
| ① | $$ 20 \sqrt{500} =
20 \sqrt{ 10 ^2 \cdot 5 } =
20 \sqrt{ 10 ^2 } \, \sqrt{ 5 } =
20 \cdot 10 \sqrt{ 5 } =
200 \sqrt{ 5 } $$ |
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