Question

focus at (-2,0) directrix the line x=2

Answer 1

I already took the subject. You try.

Answer 2

This is a pure cookbook question and just follow the procedure in your text. We are here to help if you get stuck, not to do it for you.

Answer 3

eg
https://www.khanacademy.org/math/algebra2/conics_precalc/parabolas_precalc/v/using-the-focus-and-directrix-to-find-the-equation-of-a-parabola