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April 19, 2015

April 19, 2015

Posted by **bob** on Sunday, January 29, 2012 at 4:04pm.

- algebra -
**Damon**, Sunday, January 29, 2012 at 4:36pmx(x+7) = 450

x^2 + 7 x - 450 = 0

x = [ - 7 +/- sqrt (49+1800) ] / 2

x = [ - 7 +/- sqrt (1849) ] / 2

x = [ -7 +/- 43 ]/2

x = 18

x+7 = 25

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