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4 June, 16:22

What is the value of the product (4 - 2i) (6 + 2i) ? 20 - 4i 20 + 16i 28 + 16i 28 - 4i

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Answers (2)
  1. 4 June, 16:41
    0
    28-4i

    Step-by-step explanation:

    There for the answer is D
  2. 4 June, 16:46
    0
    (4 - 2i) (6 + 2i)

    FOIL

    First : 4*6 = 24

    Outer: 4*2i = 8i

    Inner: - 2i * 6 = - 12i

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

    Add together

    24+8i-12i+4

    28-4i

    Answer: 28-4i
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