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January 31, 2015

January 31, 2015

Posted by **Dayana** on Thursday, July 21, 2011 at 10:16pm.

- math -
**Anonymous**, Thursday, July 21, 2011 at 10:38pm(8x-4y)*(5x+9y)=5x*8x-5x*4y+9y*8x-9y*4y=

40x^2-20xy+72xy-36y^2=

40x^2+52xy-36y^2

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