Lines represented by `4x^(2)+4xy+y^(2)=0` are

If the lines represented by ax^(2)+4xy+4y^(2)=0 are real distinct, then

The equation of the lines represented by x^(2)+2xy-y^(2)=0 are

Lines represented by x^(2)+7xy+2y^(2)=0 are

Lines represented by x^(2)+2xy-y^(2)=0 are

The equation of the lines represented by 3x^(2)-7xy+4y^(2)=0 are

The acute angle theta between the lines represented by x^(2)-4xy+y^(2)=0 is

Find the measure of the acute angle between the lines represented by x^(2) + 4xy + y^(2) = 0 .

The acute angle theta between the lines represented by 4x^(2)+5xy+y^(2)=0 is

The joint equation of lines passing through the origin and perpendicular to lines represented by x^(2)+4xy-5y^(2)=0 is