My Math Forum focus and equation of directrix of Parabola

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 January 24th, 2016, 06:30 PM #1 Senior Member   Joined: Jul 2011 Posts: 405 Thanks: 16 focus and equation of directrix of Parabola If $\displaystyle A(4,-2)$ and $\displaystyle (0,-1)$ be two point on the parabola Normals at which intersect at $\displaystyle P(2,2)$ Then equation of directrix and focus of parabola is
 January 25th, 2016, 10:37 AM #2 Senior Member   Joined: May 2008 Posts: 301 Thanks: 81 Beer soaked ramblings follow. What have you done so far?
 January 25th, 2016, 04:47 PM #3 Math Team   Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 14,597 Thanks: 1038 No hanky-panky?

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