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3 February, 18:28

Use the distributive property (FOIL) to simplify the expression (2-4i) (5+i). Show your work.

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  1. 3 February, 18:31
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    14 - 18i

    Step-by-step explanation:

    (2-4i) (5+i)

    FOIL

    first : 2*5 = 10

    outer: 2*i = 2i

    inner: - 4i*5 = - 20i

    last: - 4i*i = - 4i^2 = - 4 (-1) = 4

    Add these together = 10+2i - 20i + 4 = 14 - 18i
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