Question 879032
The directrix is on the other side of the vertex from the focus and is x=-6, y is unrestricted.  The general point for the directrix is any of (-6,y).  The parabola is a general point, (x,y).  Following the definition of a parabola, form the equation:


{{{sqrt((x-3)^2+(y-0)^2)=sqrt((x-(-6))^2+(y-y)^2)}}};
Simplify that and put into either general form or standard form.