Question
Answer
$$\sqrt{\dfrac{4}{81}}=\dfrac{2}{9}$$
Explanation
| $$ \begin{aligned}\sqrt{\frac{4}{81}}& \xlongequal{ }\frac{1}{9}\sqrt{4} \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}\frac{2}{9}\end{aligned} $$ | |
| ① | $$ \frac{ 1 }{ 9 } \sqrt{ 4 } = \frac{ 1 }{ 9 } \cdot 2 = \frac{ 2 }{ 9 } $$ |
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