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 one of the lines represented by the equation ax^(2)+2hxy+by^(2)=0 be y=mx then

If one of the lines represented by the equation ax^(2)+2hxy+by^(2)=0 be y=mx then

if one of the lines given by the equation ax^2+2hxy+by^2=0 coincides with one of the lines given by a'x^2+2h'xy+b'y^2=0 and the other lines representted by them be perpendicular , then . (ha'b')/(b'-a')=(h'ab)/(b-a)=1/2sqrt(-a a' b b')

if one of the lines given by the equation ax^2+2hxy+by^2=0 coincides with one of the lines given by a'x^2+2h'xy+b'y^2=0 and the other lines representted by them be perpendicular , then . (ha'b')/(b'-a')=(h'ab)/(b-a)=1/2sqrt((-aa'bb') .

If the line x+2=0 coincides with one of the lines represented by x^(2)+2xy+4y+k , then k=

if h^2=ab , then the lines represented by ax^2+2hxy+by^2=0 are

if h^2=ab , then the lines represented by ax^2+2hxy+by^2=0 are

if h^2=ab , then the lines represented by ax^2+2hxy+by^2=0 are