Question
Answer
$$9\sqrt{5}\cdot5\sqrt{10}=225\sqrt{2}$$
Explanation
| $$ \begin{aligned}9\sqrt{5}\cdot5\sqrt{10}& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}225\sqrt{2}\end{aligned} $$ | |
| ① | $$ 45 \sqrt{50} =
45 \sqrt{ 5 ^2 \cdot 2 } =
45 \sqrt{ 5 ^2 } \, \sqrt{ 2 } =
45 \cdot 5 \sqrt{ 2 } =
225 \sqrt{ 2 } $$ |
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