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Posted by **Amber** on Wednesday, April 28, 2010 at 12:15am.

13rs(squared)-r+42s(squared)+6s(squared)-8rs(squared)-3r

- Math!!! -
**Reiny**, Wednesday, April 28, 2010 at 8:13amwrite it as

13rs^2 - r + 42s^2 + 6s^2 - 8rs^2 - 3r

= 5rs^2 + 48s^2 - 4r

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