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28-10-2020
Mathematics

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(3 + zi) (3 + 4i) - (3 + zi) (3 - 2i)
Express in simplest a+bi form

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28-10-2020

Answer:

Step-by-step explanation:

9+12i+3zi+4zi²-(9-6i+3zi-2zi²)

= 9+12i+3zi+4zi²-9+6i-3zi+2zi²

= 18i+6zi²

= i(18+6zi) or 6i(3+zi)

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