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OpenStudy (anonymous):
Add the complex expressions, and simplify. (-3.9 + 3.6i) + (7.4 + 6.6i)
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OpenStudy (saifoo.khan):
3.5 + 10.2 i
OpenStudy (anonymous):
-3.9 +7.4 +3.6i +6.6i 3.5 + 10.2i
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