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# Perform the indicated operation and write the answer in the form a +bi, where a and... Perform the indicated operation and write the answer in the form a +bi, where a and b are real numbers. 28) (6-5i)(7 +3i) A) -15;2 - 171 +42 B) 57 - 171 C) 27 - 531 D) 57 +171 Write the quotient in the form a +bi. 9 +41 29) 2-4i B) -1.4, C) -1 5 Use De Moivre's theorem to simplify the expression. Write the answer in a +bi form. 30) (3 (cos 120° + i sin 120°))4 A) 70.15 - 40.51 B) -40.5 +70.151 C) -1.5 +2.60i D) 2.60 - 1.51

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