Bisector of angle between the pair of lines

Show that the equation of the pair of bisector of angles between the pair of lines ax^2 + 2hxy + by^2 = 0 is h (x^2 - y^2) = (a-b)xy .

If the equation of pair of bisectors of the angle between the pair of lines 3x^(2)+xy+by^(2)=0 is x^(2)-14xy-y^(2)=0 then b=

If the equation of the pair of bisectors of the angle between the pair of lines 3x^(2)+xy+by^(2)=0 is x^(2)-14xy-y^(2)=0 then the value of b is

Find the equation of pair of bisectors of the angles between the pair of lines. 3x^(2)+xy-2y^(2)=0

Find the equation of pair of bisectors of the angles between the pair of lines. 6x^(2)+5xy-6y=0

If the coordinate axes are the bisectors of the angles between the pair of lines ax^(2)+2hxy+by^(2)=0 , then

If the coordinate axes are the bisectors of the angles between the pair of lines ax^(2)+2hxy+by^(2)=0 , then

If the coordinate axes are the bisectors of the angles between the pair of lines ax^(2)+2hxy+by^(2)=0 , then

If the coordinate axes are the bisectors of the angles between the pair of lines ax^(2)+2hxy+by^(2)=0 , then