Question
Answer
$$\sqrt{3}\cdot(9+\sqrt{15})=9\sqrt{3}+3\sqrt{5}$$
Explanation
| $$ \begin{aligned}\sqrt{3}\cdot(9+\sqrt{15})& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}9\sqrt{3}+3\sqrt{5}\end{aligned} $$ | |
| ① | $$ \color{blue}{ \sqrt{3} } \cdot \left( 9 + \sqrt{15}\right) = \color{blue}{ \sqrt{3}} \cdot9+\color{blue}{ \sqrt{3}} \cdot \sqrt{15} = \\ = 9 \sqrt{3} + 3 \sqrt{5} $$ |
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