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Mathematics, 25.10.2019 16:43 celestemaria0727

Which pair of complex factors results in a real-number product?

a. 15(–15i)

b. 3i(1-3i)

c. (8 + 20i)(–8 – 20i)

d. (4+7i)(4-7i)

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Which pair of complex factors results in a real-number product?

a. 15(–15i)

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