Question
Answer
$$15-\sqrt{112}=15-4\sqrt{7}$$
Explanation
| $$ \begin{aligned}15-\sqrt{112}& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}15-4\sqrt{7}\end{aligned} $$ | |
| ① | $$ - \sqrt{112} =
- \sqrt{ 4 ^2 \cdot 7 } =
- \sqrt{ 4 ^2 } \, \sqrt{ 7 } =
- 4 \sqrt{ 7 }$$ |
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