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January 28, 2015

January 28, 2015

Posted by **Nick** on Sunday, April 11, 2010 at 7:20pm.

r^4 s^4 - 81

- Algebra II -
**Damon**, Sunday, April 11, 2010 at 7:50pmdifference of two squares

- Algebra II -
**Damon**, Sunday, April 11, 2010 at 7:53pmr^4 s^4 - 81

(r^2s^2 - 9 )(r^2s^2 + 9 )

(rs-3)(rs+3)(r^2s^2+9)

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