Question
Answer
$$\sqrt{55}\cdot5\sqrt{22}=55\sqrt{10}$$
Explanation
| $$ \begin{aligned}\sqrt{55}\cdot5\sqrt{22}& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}55\sqrt{10}\end{aligned} $$ | |
| ① | $$ 5 \sqrt{1210} =
5 \sqrt{ 11 ^2 \cdot 10 } =
5 \sqrt{ 11 ^2 } \, \sqrt{ 10 } =
5 \cdot 11 \sqrt{ 10 } =
55 \sqrt{ 10 } $$ |
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