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April 21, 2015

April 21, 2015

Posted by **Katy** on Friday, October 7, 2011 at 10:31am.

(x^2-1)(x-1)-x

- algebra -
**Steve**, Friday, October 7, 2011 at 11:00amplug it in and see!

(1-1)(1-1)-1 = 0*0-1 = -1

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