If the equation `kxy+10x+6y+4=0` represents a pair of lines then : `k=`

If kxy+10x+6y+4=0 represents a pair of lines, then k=

If the equation kx^(2)-y^(2)+4x-y=0 represents a pair of line, then k=

If the equation given by hxy+10x+6y+4=0 represents a pair of lines, then h is equal to

If the equation 2x^2-2xy-y^2-6x+6y+c=0 represents a pair of lines then c=

If the equation 2x^(2)+kxy-3y^(2)-x-4y-1=0 represents a pair of lines then the value of ' 'k' can be:

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

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