# #12 - Exponents

### Sample Question:

12. For all $$x > 0$$ and $$y > 0$$, the radical expression $$\frac{\sqrt{x}}{3\sqrt{x} - \sqrt{y}}$$ is equivalent to:

A. $$\frac{3x - \sqrt{xy}}{9x + y}$$

B. $$\frac{3x - \sqrt{xy}}{3x + y}$$

C. $$\frac{3x + \sqrt{xy}}{9x - y}$$

D. $$\frac{3x + \sqrt{xy}}{3x - y}$$

E. $$\frac{x}{3x - y}$$