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yehuda
02/03/13 03:23am

Excerpt rom the documentation
"PlusMinus[x,y,\[Ellipsis]] has no built-in meaning."

so, no matter what you do, you will not get a meaningful result out of it without DEFINING what it means (operationally)

As for filtering out elements of a list according to some criteria
read (carefully this time) the documentation on the functions
1. Select
2. Cases

yehuda


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Subject (listing for 'Solving quadratic equation')
Author Date Posted
Solving quadratic equation matt 02/02/13 3:19pm
Re: Solving quadratic equation Bill Simpson 02/02/13 11:41pm
Re: Solving quadratic equation yehuda 02/03/13 03:23am
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