The equation to pair of llines perpendicular to x2 + 3xy + 2y2 = 0 and passing through (-1,-1) is
x2 + 3xy + 2y2 - x + y = 0
x2 - 3xy + 2y2 - x + y = 0
x2 - 3xy -2y2 + x - y = 0
x2 - 3xy + 2y2 + x + y = 0
Solution of this ques