Answers

2014-11-06T21:04:38+08:00
Again, 2 complex numbers are equal IF and ONLY IF their real and their imaginary parts are equal:

(6 + 5i)^2 = x - yi
36 + 60 i + 5i^2 = x - yi
36 + 60 - 5 = x - yi
31 + 60i = x - yi

x = 31

60 = -y
y = -60
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