Hey,

I'm not sure if i'm porting this thread under the right topic, but i just have a quick question about complex numbers.

when you square a complex number (eg. z^2; where z=2+4i) can you just solve this by going z*z???

Thanks,

Function

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- May 18th 2009, 05:50 PMfunctionSquaring Complex numbers
Hey,

I'm not sure if i'm porting this thread under the right topic, but i just have a quick question about complex numbers.

when you square a complex number (eg. z^2; where z=2+4i) can you just solve this by going z*z???

Thanks,

Function - May 18th 2009, 05:53 PMTheEmptySet
- May 19th 2009, 06:26 AMHallsofIvy
Perhaps function was thinking of |z| which, for a complex number, is $\displaystyle \sqrt{zz*}$ where z* is the complex conjugate of z. For a

**real**number, x, that would be the same as $\displaystyle \sqrt{x^2}$, but not for a non-real complex number.