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Question

Solve the equation z2+|z|=0, where z is a complex number.

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Solution

Simplifying z2+|z|=0

z2=|z|

z2=|z|

|z|2|z|=0

|z|(|z|1)=0

|z|=0,1

If |z|=0, then z=0 and if |z|=1, then,

z2=1

z=±i

Therefore, the solutions are 0,i,i.


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