The formula for midpoint = x1+x22, y1+y22
(-4,-2) = (x,y)
x = x1+x22
-4 = −8+p2
-4 * 2 = -8 + p
-8 + 8 = p
: p = 0
y = y1+y22
-2 = −12+q2
-2 * 2 = -12 + q
-4 + 12 = q
: q = 8