IF the equation `x^(2) + y^(2) + 2gx + 2fy + 1 = 0` represents a pair of lines, then

If the equation ax ^(2) - 6xy +y ^(2) + 2gx + 2fy + x =0 represents a pair of lines whose slopes are m and m^(2), then sum of all possible values of |(3a)/(10)| is "______"

The equation x^(2) + y^(2) + 2gx + 2fy + c=0 reprsents the circle if

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

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

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

If the equation x^(2) + y^(2) + 2gx + 2fy + c = 0 represents a circle with X-axis as a diameter , and radius a, then :