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October 21, 2014

October 21, 2014

Posted by **miguel** on Tuesday, November 16, 2010 at 6:35pm.

- math -
**Reiny**, Tuesday, November 16, 2010 at 6:53pmDon't the four angles in a quadrilateral add up to 360° ?

so solve

10x-25 + 10x + 3x^2 + 2x = 360

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