[" The equation "],[16x^(2)+y^(2)+8xy-74x-78y+212=(]

The equation 16 x^2+y^2+8x y-74 x-78 y+212=0 represents a. a circle b. a parabola c. an ellipse d. a hyperbola

Which of the following points in the xy-plane represents the center of the circle defined by the equation x ^(2) +y ^(2) -4x-8y-16 =0 ?

The point of intersection of the straight lines given by the equation 3y^2 - 8xy - 3x^2 - 29x - 3y + 18 = 0 is :

The length of the tangent from a point on x^(2)+y^(2)+8x+8y-4=0 to 2x^(2)+2y^(2)+16x+16y+1=0 is

The length of the tangent from a point on x^(2)+y^(2)+8x+8y-4=0 to 2x^(2)+2y^(2)+16x+16y+1=0 is

The equation of the common tangent to x^(2)+y^(2)=8 and y^(2)=16x is