Tap the blue circles to see an explanation.
| $$ \begin{aligned}\frac{3+\sqrt{7}}{3-7}& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}\frac{3+\sqrt{7}}{-4} \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}-\frac{3+\sqrt{7}}{4}\end{aligned} $$ | |
| ① | Simplify numerator and denominator |
| ② | Place a negative sign in front of a fraction. |