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Posted by **Ashley** on Wednesday, July 27, 2011 at 12:36am.

Completely factor the following expression:

64y^2-49z^2

Is the answer: 128 y-49

- MATH! -
**Dr Russ**, Wednesday, July 27, 2011 at 6:27amIt is the difference of two squares so use

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

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