find equation of directrix and foci of parabola `y^2=-8x+16`

Find the equation of the directrix of the parabola y^2=-8x .

Find the vertex, focus, equation of directrix and axis, of parabolas y^(2) - 2y + 8x - 23 = 0

Equation of directrix of parabola 2y^2=x is 8x + 1 = 0

The equation of the directrix of the parabola y^(2)=-8x is

Find the equation of the directrix of the parabola y^2=-12x

Equation of directrix of the parabola 3x^(2) = 8y is

Find the coordinates of the centre, foci and equation of directrix of the hyperbola x^2-3y^2-4x=8 .

Find the coordinates of the vertex and focus and the equations of the directrix and axis of the parabolas (i) y^(2) = 16 x

The equation of the directrix of the parabola x^(2) = 8y is