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10 March, 20:32

Multiply and simplify the following complex numbers: (5+2i) ⋅ (-5-i)

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Answers (1)
  1. 10 March, 21:50
    0
    - 23 - 15i

    Step-by-step explanation:

    Given

    (5 + 2i) ( - 5 - i) ← expand the factors using FOIL

    = - 25 - 5i - 10i - 2i² → i² = - 1

    = - 25 - 15i + 2

    = - 23 - 15i
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