From: Angus Hammond <angushammond@...>
Date: 2010-05-30T04:56:43+09:00
Subject: Square Root

Is there a way to get an accurate square root?
This means that a negative number should return the appropriate complex 
number. I have been having some trouble with this in a program that 
solves quadratic equations recently. Ideally but not necessarily it 
should be able to get the square root of complex numbers as well.
NB Neither -2**0.5 or Math::sqrt(-2) return appropriate answers. (-2 and 
an error respectively)
Thanks in advance.