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this is given in book.... |z|^2 – 2|z| – 4 then {|z| – 1 + sqrt(5)} { |z| – 1 – sqrt(5)} so 1 – sqrt(5) but after using quadratic formula we get 1 – sqrt(3) Why the difference??

this is given in book....
|z|^2  – 2|z| – 4
then {|z| – 1 + sqrt(5)} {|z| – 1 – sqrt(5)}
so 1 – sqrt(5)
but after using quadratic formula we get 
  1 – sqrt(3)
Why the difference??

Grade:

1 Answers

Simran Vinaik
askIITians Faculty 1230 Points
5 years ago
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