Question
Answer
$$(\sqrt{5}+\sqrt{2})(-\sqrt{7}-\sqrt{2}\cdot1)=-\sqrt{35}-\sqrt{10}-\sqrt{14}-2$$
Explanation
| $$ \begin{aligned}(\sqrt{5}+\sqrt{2})(-\sqrt{7}-\sqrt{2}\cdot1)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-\sqrt{35}-\sqrt{10}-\sqrt{14}-2\end{aligned} $$ | |
| ① | $$ \color{blue}{ \left( \sqrt{5} + \sqrt{2}\right) } \cdot \left( - \sqrt{7}- \sqrt{2}\right) = \color{blue}{ \sqrt{5}} \cdot- \sqrt{7}+\color{blue}{ \sqrt{5}} \cdot- \sqrt{2}+\color{blue}{ \sqrt{2}} \cdot- \sqrt{7}+\color{blue}{ \sqrt{2}} \cdot- \sqrt{2} = \\ = - \sqrt{35}- \sqrt{10}- \sqrt{14}-2 $$ |
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