[" The lines a "^(2)x^(2)+bcy^(2)=a(b+c)xy" will be "],[" coincident,if: "]

The lines a^2x^2+bcy^2=a(b+c)xy will be coincident , if

The lines a^2x^2+bcy^2=a(b+c)xy will be coincident , if

If the equation a^(2)x^(2)+bxy^(2)=a(b+c)xy represents a pair of coincident lines, then

If lines a^(2)x^(2)+bcy^(2)=a(b+c)xy are mutually perpendicular then

If lines a^(2)x^(2)+bcy^(2)=a(b+c)xy are mutually perpendicular then

If lines 2x^(2)+8xy+ky^(2)=0 are coincident then k=

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 one of the lines represented by the equation ax^(2)+2hxy+by^(2)=0 is coincident with one of the lines represented by a'x^(2)+2h'xy+b'y^(2)=0, then

If the equation k(x^(2)+y^(2))=8xy represents a pair of coincident lines, If k=