Asked by phill
equation for parabola with focus (8,-2) directrix x=4
Answers
Answered by
Steve
The standard parabola y^2 = 4px has focus at (p,0). So, we want to make that distance=4, so p=2.
That gives us y^2 = 8x for a parabola with focus at (8,0). Now shift that focus to (8,4) and we have
(y-4)^2 = 8x
That gives us y^2 = 8x for a parabola with focus at (8,0). Now shift that focus to (8,4) and we have
(y-4)^2 = 8x
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