[newbie] positive root

• Subject: [newbie] positive root
• From: Hugo Coolens
• Date: Thu, 21 Nov 2013 17:34:18 +0100

I found the following in the documentation:
sqrt (x^2);
gives abs(x)

However:

sqrt(x^4-2*x^2+1);

does not result in
abs(x^2-1)
but leaves the expression untouched.


It puzzles me why, can I make Maxima do it?

thanks
hugo

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