Question
Answer
$$\sqrt{15}\cdot(2+\sqrt{3})=2\sqrt{15}+3\sqrt{5}$$
Explanation
| $$ \begin{aligned}\sqrt{15}\cdot(2+\sqrt{3})& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}2\sqrt{15}+3\sqrt{5}\end{aligned} $$ | |
| ① | $$ \color{blue}{ \sqrt{15} } \cdot \left( 2 + \sqrt{3}\right) = \color{blue}{ \sqrt{15}} \cdot2+\color{blue}{ \sqrt{15}} \cdot \sqrt{3} = \\ = 2 \sqrt{15} + 3 \sqrt{5} $$ |
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