If the bisectors of angles represented by `ax^2+2hxy+by^2=0` and `a'x^2+2h'xy+b'y^2=0` is same , then

If the bisectors of the angles between the pairs of lines ax^(2)+2hxy+by_(2)=0 and ax^(2)+2hxy+by^(2)+lamda(x^(2)+y^(2))=0 are coincident, then: lamda=

If the pairs of lines ax^2+2hxy+by^2=0 and a'x^2+2h'xy+b'y^2=0 have one line in common, then (ab'-a'b)^2 is equal to

The pair of lines joining the origin to the points of intersection of the curves ax^2+2hxy+by^2+2gx=0 and a'x^2+2h'xy+b'y^2+2g'x=0 will be at right angles to one another , if

The number of values of lambda for which the bisectors of the angle between the lines ax^(2)+2hxy+by^(2)+lambda(x^(2)+y^(2))=0 are the same as those of ax^(2)+2hxy+by^(2)=0 is

The lines joining the origin to the points of intersection of the curves : ax^(2)+2hxy+by^(2)+2gx=0 and a'x^(2)+2h'xy+b'y^(2)+2g'x=0 are ate right angles if :

If the equation ax^2 +2hxy + by^2 = 0 and bx^2 - 2hxy + ay^2 =0 represent the same curve, then show that a+b=0 .

If the equation ax^2 +2hxy + by^2 = 0 and bx^2 - 2hxy + ay^2 =0 represent the same curve, then show that a+b=0 .