Answer:
midpoint: 10 -2i
Explanation:
You want the midpoint between z1 = 12+7i and z2 = 8 -11i.
Midpoint
The midpoint of a line segment has coordinates that are the average of the coordinates of the endpoints.
M = (z1 +z2)/2 = ((12 +7i) +(8 -11i))/2 = (20-4i)/2
M = 10 -2i
The midpoint between z1 and z2 is 10 -2i.