Question
Answer
$$\dfrac{4}{3}\sqrt{63}=4\sqrt{7}$$
Explanation
| $$ \begin{aligned}\frac{4}{3}\sqrt{63}& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}4\sqrt{7}\end{aligned} $$ | |
| ① | $$ \frac{ 4 }{ 3 } \sqrt{ 63 } =
\frac{ 4 }{ 3 } \sqrt{ 3 ^2 \cdot 7 } =
\frac{ 4 }{ 3 } \sqrt{ 3 ^2 } \, \sqrt{ 7 } =
\frac{ 4 }{ 3 } \cdot 3 \sqrt{ 7 } =
4 \sqrt{ 7 } $$ |
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