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Mathematics
OpenStudy (anonymous):

Which complex expression is simplified correctly? Answer A. (10 - 2i)(3 + 3i) - (18 + 5i) + 20i = 18 - 39i B. 5(1 + 2i) - (6 - 5i) = 1 + 15i C. 2i(5 - i)2 = 48 + 20i D. -3(4i + 5) + 7i (8 - 11i) = 62 + 44i

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