Question
Answer
$$6\sqrt{2}\cdot5\sqrt{14}=60\sqrt{7}$$
Explanation
| $$ \begin{aligned}6\sqrt{2}\cdot5\sqrt{14}& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}60\sqrt{7}\end{aligned} $$ | |
| ① | $$ 30 \sqrt{28} =
30 \sqrt{ 2 ^2 \cdot 7 } =
30 \sqrt{ 2 ^2 } \, \sqrt{ 7 } =
30 \cdot 2 \sqrt{ 7 } =
60 \sqrt{ 7 } $$ |
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