Question
Answer
$$(-5\sqrt{27})(-6\sqrt{84})=540\sqrt{7}$$
Explanation
| $$ \begin{aligned}(-5\sqrt{27})(-6\sqrt{84})& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}540\sqrt{7}\end{aligned} $$ | |
| ① | $$ 30 \sqrt{2268} =
30 \sqrt{ 18 ^2 \cdot 7 } =
30 \sqrt{ 18 ^2 } \, \sqrt{ 7 } =
30 \cdot 18 \sqrt{ 7 } =
540 \sqrt{ 7 } $$ |
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