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April 18, 2014

April 18, 2014

Posted by **:]** on Tuesday, June 9, 2009 at 6:02am.

Thanks!

- maths -
**Reiny**, Tuesday, June 9, 2009 at 10:02amI assume you want the area of the exposed part of the cardboard rectangle

it would be

3x^2 - (x-4)(3x-4)

= 3x^2 - (3x^2 - 16x - 16)

= 16x + 16

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