Question
Answer
$$5\cdot(3+\sqrt{2})=15+5\sqrt{2}$$
Explanation
| $$ \begin{aligned}5\cdot(3+\sqrt{2})& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}15+5\sqrt{2}\end{aligned} $$ | |
| ① | $$ \color{blue}{ 5 } \cdot \left( 3 + \sqrt{2}\right) = \color{blue}{5} \cdot3+\color{blue}{5} \cdot \sqrt{2} = \\ = 15 + 5 \sqrt{2} $$ |
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