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April 21, 2014

April 21, 2014

Posted by **Rick** on Thursday, March 1, 2012 at 11:37pm.

4x^2 + 9y^2 +7x-2y-100=0

4x^2+14xy+7x-2y-100=0

- math -
**Steve**, Friday, March 2, 2012 at 2:05pmdiscriminant is B^2 - 4AC

first: 0 - 4*4*9 < 0 so ellipse

second: 196 - 4*4*0 > 0 so hyperbola

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