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RE: Solving the Cubic


Dimitris,
	Symbolic solutions can be very error- and precision- sensitive (See
Press, et al, "Numerical Recipes.." for a trick that stabilizes quadratic
solutions.)  Do you know if Vieta's method designed to avoid numeric
instabilities?
Mark Harder



-----Original Message-----
From: dimitris [mailto:dimmechan at yahoo.com] 
Sent: Friday, December 01, 2006 3:22 AM
To: mathgroup at smc.vnet.net
Subject: [mg71883] [mg71859] Solving the Cubic

The following cell follows the Vieta's method for solving the cubic
equation complete with all the necessary steps and text explanations.
I really appreciate any kind of comments.

(code omitted ).


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