SOLUTION: prove that Re(Z1Z2)=Re(Z1)Re(Z2)

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Question 1176964: prove that Re(Z1Z2)=Re(Z1)Re(Z2)
Answer by ikleyn(52879) About Me  (Show Source):
You can put this solution on YOUR website!
.

This identity is  INCORRECT.

It is  WRONG,  and THEREFORE,  it can not be proved.


It only can be  DISPROVED.


            To disprove,  take   Z1 = i,   Z2 = -i.


Then the left side of your formula is equal to 1,  while the right side is equal to  0.     Contradiction  (!)

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From which garbage box did you recover this "problem" ?