AnswersPrecalculusPowers and Roots of Complex Numbers — Unit testQuestion 20
20
QuizMultiple Choice

Powers and Roots of Complex Numbers — Unit test

Question 20 of 25 • Precalculus

Which pair of complex numbers has a real-number product?

Answer
A
(1 + 2i)(8i)
B
(1 + 2i)(2 – 5i)
C
(1 + 2i)(1 – 2i)
D
(1 + 2i)(4i)
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