# Homework Help: Question about reducing a square root.

1. Jul 20, 2012

### ozone

IDK if this should be in the precalc section, but I was wondering how to reduce

$\sqrt{(3+\sqrt{5})} / \sqrt{(3-\sqrt{5})}$ to $(\sqrt{5} + 1) /(\sqrt{5} - 1)$

2. Jul 20, 2012

### ehild

Notice that 3±√5=0.5(6±2√5)=.5(5±2√5+1)=....

ehild