[" Factarize "],[y^(2)-8y+16=0]

The equation of the parabola with focus (0,0) and directrix x+y=4 is x^(2)+y^(2)-2xy+8x+8y-16=0x^(2)+y^(2)+8x+8y-16=0x^(2)+y^(2)-2xy+8x+8y=0x^(2)-y^(2)+8x+8y-16=0

I. x^(2) + 4x+4 = 0 II. y^(2) - 8y + 16 = 0

The lenght of the common chord of circles x^(2)+y^(2)-6x-16=0 and x^(2)+y^(2)-8y-9=0 is

Two circles x^(2) + y^(2) -2kx = 0 and x^(2) + y^(2) - 4x + 8y + 16 = 0 touch each other externally.Then k is

If the circle x^(2)+y^(2)+2ax+8y+16=0 touch x-a xi s, then the value of a is +-16 (b) +-4(c)+-8(d)+-1

Tangents are drawn to the circle x^(2)+y^(2)=16 at the points where it intersects the circle x^(2)+y^(2)-6x-8y-8=0 , then the point of intersection of these tangents is

Tangents are drawn to the circle x^(2)+y^(2)=16 at the points where it intersects the circle x^(2)+y^(2)-6x-8y-8=0 , then the point of intersection of these tangents is

Prove that the focal distance of the point (x,y) on the parabola x^(2)-8x+16y=0 is |y+5|

Find the number of possible common tangents that exist for the following pairs of circles. x^(2) + y^(2) = 4, x^(2) + y^(2) - 6 x - 8y + 16 = 0

Three normals are drawn from the point (14,7) to the curve y^(2)-16x-8y=0. Find the coordinates of the feet of the normals.