Question

What is the equation of the parabola with a focus at (3, 0) and a directrix x = -3?

Answer 1

property of parabola: distance from any point on the parabola to the focus=distance from that point to the directrix.
take an arbitrary point (x,y)
calculate the distance of (x,y) from (3,0) and to the directrix x=-3
equate them, you will get the equation of parabola in terms of x and y. try it out

Answer 2

okay thank you !