If 2x+y+a=0 is a focal chord of the parabola `y^(2)+8x=0` then a =

If 2 x+y+a=0 is a focal chord of the parabola y^(2)+8 x=0 then a=

If P S Q is a focal chord of the parabola y^2=8x such that S P=6 , then the length of S Q is

If (-1,-2sqrt2) is one of exteremity of a focal chord of the parabola y^(2)=-8x, then the other extremity is

If a focal chord of the parabola y^(2)=a x is 2 x-y-8=0 then the equation of the directrix is

If (2,-8) is at an end of a focal chord of the parabola y^(2)=32x, then find the other end of the chord.

PP' is a focal chord of the parabola y^(2)=8x . If the coordinates of P are (18,12), find the coordinates of P'

If the ends of a focal chord of the parabola y^(2) = 8x are (x_(1), y_(1)) and (x_(2), y_(2)) , then x_(1)x_(2) + y_(1)y_(2) is equal to