[" If "ax^(2)+by^(2)+2gx+2fy+c=0],[" represents an ellipse,then: "]

the equation ax^(2)+ 2hxy + by^(2) + 2gx + 2 fy + c=0 represents an ellipse , if

the equation ax^(2)+ 2hxy + by^(2) + 2gx + 2 fy + c=0 represents an ellipse , if

If ax^2 + by^2 + 2hxy + 2gx + 2fy + c = 0 represents an ellipse, then h^2 lt ab and abc +2fgh-at^2-bg^2-ch^2 != 0. If for every point (x_1,y_1) satisfying above equation onthen (2h-x_1,2k-y_1) also satisfy it,then (h,k) is centre of it. The length of semi major axis andmaximum and minimum value of the distance of a point lying on the curve from its centre..For the ellipse 2x^2 - 2xy + 4y^2 - (3 + sqrt2) = 0, the bindination of major axis of it with x-axis is

If ax^(2)+2hxy+by^(2)+2gx+2fy+c=0 represents parallel lines then

The equation x^(2) + y^(2) + 2gx + 2fy + c = 0 represents a point-circle when -

If the equation ax^(2)+ay^(2)+2gx+2fy+c=0 represents a pair of lines then

ax^2+2hxy+by^2+2gx+2fy+c=0

If ax^(2)+2hxy+by^(2)+2gx+2fy+c=0 represents two parallel straight lines, then