A line passes through the origin and makes equal angles with the positive coordinate axes. It intersects the lines
L
1 : 2x + y + 6 = 0 and L
2 : 4x + 2y – p = 0, p > 0, at the points A and B, respectively. If AB =

and the foot of the perpendicular from the point A on the line L
2 is M, then

is equal to