Please provide me some hits how to solve below problem.
ABCD is a parallelogram on the Argand plane. The affixes of $A,B,C$ are $8+5i,-7-5i,-5+5i$, respectively .Find the affix of D.
2026-04-13 09:45:03.1776073503
complex number Argand plane
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Try to locate the 3 points on the plane and use the fact that a parallelogram has 2 pairs of equal and parallel sides to determine the 4th.