Сократите дробь (x-3* корень из x)/(2* корень из x-6)

\[\ \frac{x - 3\sqrt{x}}{2\sqrt{x} - 6} = \frac{\sqrt{x}\left( \sqrt{x} - 3 \right)}{2 \cdot \left( \sqrt{x} - 3 \right)} = \frac{\sqrt{x}}{2}\]

\[\ \frac{7}{2\sqrt{21}} = \frac{7}{2\sqrt{21}} \cdot \frac{\sqrt{21}}{\sqrt{21}} = \frac{7\sqrt{21}}{42} = \frac{\sqrt{21}}{6}\]