If the equation `ax^(2)+by^(2)+cx+xy=0` represents a pair of line, then

If the equation 4x^(2)+ky^(2)+8xy-9=0 represents a pair of line, then k=

If the equation x^(2)+3xy+2y^(2)+x-y+k=0 represents a pair of line, then k=

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

If the equation ax^(2)-6xy+y^(2)=0 represents a pair of lines whose slopes are m and m^(2), then the value(s) of a is/are

If the equation 2x^2+5xy+3y^2+6x+7y+=0 represents a pair of lines, then the equation of pair of lines parallel to then and passing through the point (0,1) is

If the equation ax^(2)+hxy+by^(2)+4gx+6fy+4c=0 represents a pair of lines then

If the equation 2x^(2)+5xy+3y^(2)+6x+7y+4=0 represents a pair of lines,then the equation of pair of lines parallel to them and passing through the point (0,1) is

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

Does the equation x^(2)+xy+y^(2)=0 represent a pair of lines?