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January 31, 2015

January 31, 2015

Posted by **Christina** on Friday, January 2, 2009 at 1:06pm.

- Algebra -
**Damon**, Friday, January 2, 2009 at 2:57pmdifference of two squares (a^2-b^2 =(a-b)(a+b) in general

here (8b-(q+r))(8b+(q+r))

= (8b-q-r)(8b+q+r)

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