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September 16, 2014

September 16, 2014

Posted by **carlos** on Saturday, December 1, 2012 at 8:46pm.

- algebra -
**Damon**, Saturday, December 1, 2012 at 9:15pm(x+4)^2 = x^2 + (x-4)^2

x^2 + 8 x + 16 = x^2 + x^2 - 8 x + 16

x^2 -16 x = 0

x = 0 or x = 16

so x = 16

12, 16, 20

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