PreCal

Write the expression (7 – 7i) + (–8 – 2i) in the form a + bi

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  1. Combine the whole numbers and the i's

    (7+-8) + (-7i+-2i)

    =-1+-9i

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  2. Alison,

    Could would you tell me if the problem listed below is correct:

    (4+5i)(4-5i)=
    16+-i

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