## anonymous 4 years ago sqrtc-sqrtd/sqrtc+sqrtd

1. anonymous

|dw:1328146126808:dw|

2. Xishem

$\frac{\sqrt{c}-\sqrt{d}}{\sqrt{c}+\sqrt{d}}* ( \frac{\sqrt{c}-\sqrt{d}}{\sqrt{c}-\sqrt{d}})=\frac{c-2 \sqrt{cd} + d}{c-d}$I take it the question was to rationalize the denominator?

3. anonymous

yes it is.

4. anonymous

yes also assume that all expressions under radicals represent positive numbers.