To find the midpoint, M, of line segment AB, we can use the midpoint formula:
M = ((x₁ + x₂)/2, (y₁ + y₂)/2)
Given that A = (-5, 5) and B = (5, -5), we can substitute these values into the formula:
M = ((-5 + 5)/2, (5 + (-5))/2)
M = (0/2, 0/2)
M = (0, 0)
So, the midpoint M of line segment AB is (0, 0).