The equation `xy+a^2=a(x+y)` represents

The equation x^(2)-7xy-y^(2)=0 represents

The equation x^(2)-7xy-y^(2)=0 represents

The solution of the equation 2xy' - y = 3 represents a family of

The equation 2x^2+5xy - 12y^2=0 represents a

The equation (x+y=6)(xy-3x-y+3=0) represents the sides of a triangle then the equation of the circumcircle of the triangle is

What does the equation x^(3)y+xy^(3)-xy=0 represent?

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

The equations of the lines represented by the equation ax^(2)+(a+b)xy+by^(2)+x+y=0 are

The equations of the lines represented by the equation ax^2 + (a + b)xy + by^2 + x + y = 0 are

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