Question
Answer
$$(-3\sqrt{5})\cdot6\sqrt{68}=-36\sqrt{85}$$
Explanation
| $$ \begin{aligned}(-3\sqrt{5})\cdot6\sqrt{68}& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-36\sqrt{85}\end{aligned} $$ | |
| ① | $$ - 18 \sqrt{340} =
-18 \sqrt{ 2 ^2 \cdot 85 } =
-18 \sqrt{ 2 ^2 } \, \sqrt{ 85 } =
-18 \cdot 2 \sqrt{ 85 } =
-36 \sqrt{ 85 } $$ |
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