Question
Answer
$$\dfrac{-12+\sqrt{72}}{2}=\dfrac{-12+6\sqrt{2}}{2}$$
Explanation
| $$ \begin{aligned}\frac{-12+\sqrt{72}}{2}& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}\frac{-12+6\sqrt{2}}{2}\end{aligned} $$ | |
| ① | $$ \sqrt{72} =
\sqrt{ 6 ^2 \cdot 2 } =
\sqrt{ 6 ^2 } \, \sqrt{ 2 } =
6 \sqrt{ 2 }$$ |
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