The equation `x^2+y^2+2x-4y+5=0` represents a. a point b. a pair of straight lines c. a circle of non zero radius d. none of these

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

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

x^2-x y+y^2-4x-4y+16=0 represents a. a point b. a circle c. a pair of straight line d. none of these

x^2-x y+y^2-4x-4y+16=0 represents a. a point b. a circle c. a pair of straight line d. none of these

x^2-x y+y^2-4x-4y+16=0 represents a. a point b. a circle c. a pair of straight line d. none of these

x^2-x y+y^2-4x-4y+16=0 represents a. a point b. a circle c. a pair of straight line d. none of these

x^(2)-xy+y^(2)-4x-4y+16=0 represents a.a point b.a circle c.a pair of straight line d. none of these

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

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

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