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Error in example of polyroots

Posted by ptc-4387261 on Dec 26, 2011 4:14:16 AM

Hello ,



This is my first blog .


It is attached and it is taken from an  old  Mathcad Guide  version 7  .



I tryed the example  and the result was the same .



But  replacing the root = 1 in the  polynomial  i Obtain -8   instead of   zero  .



What is wrong  ?



Regards  Ernesto

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