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16 June, 22:30

Explain in detail with at least two sentences how to represent the product of A and B geometrically given that A=15+56i and B = 7 + 4i. Give the coordinate of A • B in polar form.

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  1. 16 June, 23:53
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    Basically each part of the first complex number gets multiplied by each part of the second complex number. You are multiplying 2 binomials.

    (15 + 56i (7 + 4i)

    = 105 + 60i + 392i + 224i^2

    = 105 + 452i - 224 (because i^2 = - 1)

    = - 119 + 452i
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