hello guys, wondering why this expression

$\displaystyle -\mid(-Z)\mid $ should give +Z while $\displaystyle -\mid-Z\mid $ should give -Z

pls i need reassurance on this, thanks

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- Dec 12th 2012, 06:34 AMlawochekelcomplex variable!
hello guys, wondering why this expression

$\displaystyle -\mid(-Z)\mid $ should give +Z while $\displaystyle -\mid-Z\mid $ should give -Z

pls i need reassurance on this, thanks - Dec 12th 2012, 07:13 AMemakarovRe: complex variable!
If $\displaystyle |u|$ denotes the absolute value of $\displaystyle u$, then $\displaystyle -|(-z)|$ and $\displaystyle -|{-z}|$ are the same expression, and it is not true that $\displaystyle -|{-z}|=z$ or $\displaystyle -|{-z}|=-z$ for all complex $\displaystyle z$.