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9 October, 11:31

Perform the indicated operation and write the result in the form a+bi. - 9i (-9i+4) + 3 (8+8i)

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Answers (2)
  1. 9 October, 11:52
    0
    D^^

    Step-by-step explanation:

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  2. 9 October, 11:55
    0
    - 57 - 12i

    distribute the parenthesis

    = 81i² - 36i + 24 + 24i

    [ note that i² = (√ - 1) ² = - 1 ]

    = - 81 - 36i + 24 + 24i (collect like terms)

    = - 57 - 12i
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