6. Сократим дроби.
1) $$\frac{c - 36}{\sqrt{c} - 6} = \frac{(\sqrt{c} - 6)(\sqrt{c} + 6)}{\sqrt{c} - 6} = \sqrt{c} + 6$$
Ответ: $$\sqrt{c} + 6$$
2) $$\frac{7 + 3\sqrt{7}}{\sqrt{7}} = \frac{\sqrt{7}(\sqrt{7} + 3)}{\sqrt{7}} = \sqrt{7} + 3$$
Ответ: $$3 + \sqrt{7}$$