Engineering Board Exam Reviewer · Parabolas · medium
Find the equation of the parabola with focus (2,3) and directrix x=-2.
- - 8 x + y2 - 6 y + 9 = 0
- 8 x + y2 - 6 y + 9 = 0
- - 4 x + y2 - 6 y + 9 = 0
- x2 - 4 x - 8 y + 28 = 0
Answer
A. - 8 x + y2 - 6 y + 9 = 0
Solution
The vertex is midway at (0,3) and p=2. (y-3)2=8x y2-6y+9-8x=0.
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