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30 June, 15:30

What is the product of the complex numbers (-3i + 4) and (3i + 4) ?

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  1. 30 June, 15:35
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    (-3i+4) (3i+4)

    (-3i*3i) + (-3i*4) + (3i*4) + (4*4)

    -3i^2 - 12i + 12i + 16

    Since i^2 = - 1

    we get:

    9 - 12i + 12i + 16

    =25

    Therefore, the product of the complex numbers is 25.
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