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Mathematics 13 Online
OpenStudy (kymber):

How do you find the focus and directrix of a parabola given an equation?

OpenStudy (anonymous):

http://bit.ly/16ubUIs

OpenStudy (kymber):

I already tried Googling it. Nothing helps for the equations that I'm supposed to find it from. But thanks for being a wingspan.

OpenStudy (anonymous):

http://www.purplemath.com/modules/parabola.htm

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