Combined equation of pair of lines joining origin and intersection of a curve and line

The equation of pair of straight lines joining the point of intersection of the curve x^2+y^2=4 and y-x=2 to the origin , is

The equation of pair of lines joining origin to the points of intersection of x^2 + y^2 =9 and x + y = 3

Combined equation of pair of lines passing through origin and inclined at 30^(@) and 60^(@) respectively with x-axis is

The equation of pair of lines joining origin to the points of intersection of x^(2)+y^(2)=9 and x+y=3

The equation of the pair of lines joining the origin to the points of intersection of x^2+y^2=9 and x+y=3 , is

The equation of the pair of lines joining the origin to the points of intersection of x^(2) + y^(2) = 9 and x + y = 3 , is

The equation of pair of lines joining origin to the points of intersection of x^(2)+y^(2)=9 and x+y=3 is

The combined equation of pair of lines passing through origin and perpendicular to the lines given by 2x^(2)-3xy+y^(2)=0 is