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31 December, 20:25

Multiply (4+I) (1-5i)

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  1. 31 December, 21:27
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    The rule to remember for this problem is: i^2 = - 1

    (4 + i) (1 - 5i)

    4 - 20i + i - 5i^2

    4 - 19i + 5

    9 - 19i
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