The equation `x^2y^2-9y^2-6x^2y+54 y=0` represents (a)a pair of straight lines and a circle (b)a pair of straight lines and a parabola (c)a set of four straight lines forming a square (d)none of these

The equation x^(2)y^(2)-9y^(2)-6x^(2)y+54y=0 represents (a)a pair of straight lines and a circle (b)a pair of straight lines and a parabola (c)a set tof four straight lines forming a square (d)none of these

a(x^(2)-y^(2))+xy=0 represents a pair of straight lines for

The equation x^(2)+kxy+y^(2)-5x-7y+6=0 represents a pair of straight lines, then k is

If the equation 3x^(2)-2y^(2)+lamda xy -x+5y-2=0 represents a pair of straight lines then lamda=

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

If the equation 3x^(2)+xy-y^(2)-3x+6y+k=0 represents a pair of straight lines, then the value of k, is

If lambda x^(2)+6xy+9y^(2)+4x+12y+3=0 represents a pair of straight lines then lambda

For which value of 'p', y^(2)+xy+px^(2)-x-2y=0 represents a pair of straight lines