The equation of a parabola is (y+2)^2=12(x−5) .
What is the equation of the directrix of the parabola?
(y+2)^2=12(x−5)
The vertex is ( 5, -2) and the parabola opens to the right
And 4p = 12 → p = 3
So....the equation of the directrix is x = 2
+149 
