Question
Answer
$$2\sqrt{15}\sqrt{3}=6\sqrt{5}$$
Explanation
| $$ \begin{aligned}2\sqrt{15}\sqrt{3}& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}6\sqrt{5}\end{aligned} $$ | |
| ① | $$ 2 \sqrt{45} =
2 \sqrt{ 3 ^2 \cdot 5 } =
2 \sqrt{ 3 ^2 } \, \sqrt{ 5 } =
2 \cdot 3 \sqrt{ 5 } =
6 \sqrt{ 5 } $$ |
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