Question
Answer
$$\sqrt{2}\cdot(5+\sqrt{3})=5\sqrt{2}+\sqrt{6}$$
Explanation
| $$ \begin{aligned}\sqrt{2}\cdot(5+\sqrt{3})& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}5\sqrt{2}+\sqrt{6}\end{aligned} $$ | |
| ① | $$ \color{blue}{ \sqrt{2} } \cdot \left( 5 + \sqrt{3}\right) = \color{blue}{ \sqrt{2}} \cdot5+\color{blue}{ \sqrt{2}} \cdot \sqrt{3} = \\ = 5 \sqrt{2} + \sqrt{6} $$ |
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