The problem is just to find the distance between ($\displaystyle - \sqrt{2} , - \sqrt{6}$) and ($\displaystyle \sqrt{3} , - \sqrt{2}$)

I get;

$\displaystyle \sqrt{13+ 2\sqrt{2}\sqrt{3}-2\sqrt{6}\sqrt{2}}$

while the book shows;

$\displaystyle \sqrt{13+2\sqrt{6}-4\sqrt{3}} $

I simplified the problems on a ti-30 and got the same decimal number for each answer.

So I think I'm just looking for a way to convert between the two forms.