Show that the pairs of straight lines `2x^2+6x y+y^2=0` and `4x^2+18 x y+y^2=0` have the same set of angular bisector.

Show that the pairs of straight lines 2x^(2)+6xy+y^(2)=0 and 4x^(2)+18xy+y^(2)=0 have the same set of angular bisector.

Show that the pairs of straight lines 2x^2+6x y+y^2=0 and 4x^2+18 x y+y^2=0 are equally inclined

Show that the pairs of straight lines 2x^2+6x y+y^2=0 and 4x^2+18 x y+y^2=0 are equally inclined,then b is equal to

Show that the straight lines : x-y-1=0, 4x + 3y = 25 and 2x-3y + 1 = 0 are concurrent.

Show that the straight line x-2y+3=0 and 6x+3y+8=0 are perpendicular .

Show that the straight lines : x-y-1=0 , 4x+3y=25 and 2x-3y+1=0 are concurrent.

Consider the straight lines x+2y+4=0 and 4x+2y-1=0. The line 6x+6y+7=0 is