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30 August, 00:58

Which expression is equivalent to (4+6i) ^2

A) - 20+48i

B) 8+12i

C) 16-36i

D) 20+48i

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Answers (1)
  1. 30 August, 01:08
    0
    (4+6i) ^2

    (a^2+b^2+2ab) = (a+b) ^2

    16+36 (i) ^2+2*4*6i here i^2=-1

    so answer would be 16-36+48i = - 20+48i answer is a
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