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30 May, 06:43

Write (21 - 4i) - (16 + 7i) + 28i as a complex number in standard form.

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Answers (2)
  1. 30 May, 08:52
    0
    Standard form is a + bi

    Combine like terms

    5 + 17i
  2. 30 May, 09:40
    0
    Treat i as a placeholder

    get into standard form (a+bi)

    distribute stuf and move

    21-4i-16-7i+28i

    21-16-4i-7i+28i

    5+17i
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