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

The equation 4x^(2) + 4xy + y^(2) = 0 represents two……

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=

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 ……………. .

Show that the equation x^(2)-6xy+5y^(2)+10x-14y+9=0 represents a pair of lines. Find the acute angle between them. Also find the point of intersection of the lines.

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

The equation 3ax^2+9xy+(a^2-2)y^2=0 represents two perpendicular straight lines for

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=