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September 16, 2014

September 16, 2014

Posted by **david** on Sunday, March 14, 2010 at 2:12pm.

a) 9x^2 - 49

b) 9x^2 - 121

c) 49x^2 - 25x^2

thankyou

- math -
**Reiny**, Sunday, March 14, 2010 at 5:47pmLook up "difference of squares"

Each of your questions is a basic example of that type.

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