Question
Answer
$$2\sqrt{5}(\sqrt{6}+2)=2\sqrt{30}+4\sqrt{5}$$
Explanation
| $$ \begin{aligned}2\sqrt{5}(\sqrt{6}+2)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}2\sqrt{30}+4\sqrt{5}\end{aligned} $$ | |
| ① | $$ \color{blue}{ 2 \sqrt{5} } \cdot \left( \sqrt{6} + 2\right) = \color{blue}{ 2 \sqrt{5}} \cdot \sqrt{6}+\color{blue}{ 2 \sqrt{5}} \cdot2 = \\ = 2 \sqrt{30} + 4 \sqrt{5} $$ |
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