SOLUTION: Find an equation of a parabola with a) focus (5,0) and directrix x = -5 b) focus (0,-7) and directrix y = 7 Can you please help me out? Thanks so much in advance:)

Question 867542: Find an equation of a parabola with
a) focus (5,0) and directrix x = -5
b) focus (0,-7) and directrix y = 7
Can you please help me out? Thanks so much in advance:)

Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
I suggest using Distance Formula for this one and your other request post.

Use the definition for a parabola.

Unknown set of points, (x,y).
For question (a) of this posting,
The set of directrix points, a line, is (-5,y).

Square both sides.

You might not know by looking at it, but here, the x^2 terms will disappear.

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