The equation `kx^2+4xy+5y^2=0` represents two lines inclined at an angle `pi` if `k` is

If 3x^(2)-6xy-by^(2)=0 represents a pair of lines inclined at an angle pi then b=

The equation x^(2)+ky^(2)+4xy=0 represents two coincident lines if k=

The equation x^(2)+ky^(2)+4xy=0 represents two coincident lines if k=

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

If the equations kx - 2y = 3 and 3x + y = 5 represent two intersecting lines at unique point, then the value of k is ……………. .

If the equation kx^2-2xy-y^2-2x+2y=0 represents a pair of lines , then k is equal to

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

If the equation 7x^(2)-kxy-7y^(2)=0 represents the bisectors of angles between the lines 2x^(2)-7xy+4y^(2)=0 then: k=

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

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