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An example of a quadratic that version 2.2.2 can not solve but version 3 does...

• To: mathgroup at smc.vnet.net
• Subject: [mg23404] An example of a quadratic that version 2.2.2 can not solve but version 3 does...
• From: zeno at magicnet.net
• Date: Sat, 6 May 2000 19:14:13 -0400 (EDT)
• Organization: Verio
• Sender: owner-wri-mathgroup at wolfram.com

Take the equation..

4877361379*x^2-9754525226*x+4877163849=0

This equation has 2 complex roots whose true values are..

x=.999979750116+2.89954639913*10^-10 i

x=.999979750116-2.89954639913*10^-10 i

Does anyone have any insight on the improvements to the Solve command in
Version 3 that causes it to get it correct where version 2.2.2 does not?

Version 2.2.2 gives back 2 real incorrect reuslts for x. Version 3 gets it
correct by returning the 2 complex correct results.

(This quadratic equation example is from the Advanced Functions Handbook for
the HP15C calculator. It is an example of a tough to solve quadratic.)