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February 1, 2015

February 1, 2015

Posted by **Anonymous** on Monday, January 11, 2010 at 10:58pm.

- maTH -
**drwls**, Tuesday, January 12, 2010 at 1:20amIt doesn't matter. You will get the same answer. It will go a bit faster if you recognize that

(x - 1)(x + 1)= x^2 -1

and then multiply that by x.

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