Question

How to find equation of parabola from focus and directrix. (Question fixed)(HS Level Maths)

Answer 1

I don't want to use the equating the distances formulas. I rather use the other way. Could someone tell me the alternate method?

Answer 2

\[\frac{ 1}{ 4p }(x-h)^2+k\]

Answer 3

I don't remember how to use this formula.

Answer 4

Write the equation for a parabola with a focus at (9,0) and a directrix at y=-4.