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December 21, 2014

December 21, 2014

Posted by **Khelany** on Friday, September 6, 2013 at 11:34pm.

- Math -
**Graham**, Saturday, September 7, 2013 at 12:23amVolume of rectangular prism

672 = 4*w*(w+2)

Thus:

w^2 + 2w - 168 = 0

Solve for w, using quadratic formula

w = (-b ± √(b^2-4ac))/(2a),

where

a = 1, b = 2, c = -168

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