$-16 + 16i$
Work Step by Step
Subtract each term of the subtrahend $=-7 + 5i - 9 - (-11i) \\=-7 + 5i - 9 +11i$ Regroup then simplify by combining like terms to obtain $=(-7 -9) + (5i+11i) \\= -16 + 16i$
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