Mathematics
Mathematics, 25.05.2021 16:10, AmityHeart

Which of these expressions have a value that is a real number? Choose all that are correct. A
B
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-2i (6 + 2i)
6i (6 โ€“ 21)
(6 + 2i) + (6 โ€“ 21)
(6 โ€“ 2i) โ€“ (6+21)
(6 โ€“ 2i) (6 โ€“ 2i)
(6 + 2i) (6 โ€“ 2i)

answer
Answers: 1

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Which of these expressions have a value that is a real number? Choose all that are correct. A
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