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December 21, 2014

December 21, 2014

Posted by **Jeannie** on Saturday, January 7, 2012 at 10:16pm.

- math -
**Reiny**, Saturday, January 7, 2012 at 11:40pm= 7(9s^2 + 42st + 49t^2)

= 7(3s+7t)(3s+7t)

= 7(3s+7t)^2

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