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December 19, 2014

December 19, 2014

Posted by **teri** on Sunday, January 16, 2011 at 1:33pm.

- algebra -
**Damon**, Sunday, January 16, 2011 at 1:53pmd^2 = (a-1)^2 + 9 = 25

a^2 -2a + 10 = 25

a^2 - 2a = 15

a^2 - 2a - 15 = 0

a = [ 2 +/- sqrt(64))/2

a = 2+/- 8

a = 10 or -6

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