Straight Lines And Pair Of Straight Lines

The combined equation of the two lines \(ax+by+c=0\) and \(a'x+b'y+c'=0\) can be written as


\((ax+by+c)(a'x+b'y+c')=0\).

The equation of the angle bisectors of the lines represented by the equation \(2x^2+xy-3y^2=0\) is :