# Math Help - complex variable!

1. ## complex variable!

hello guys, wondering why this expression

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

pls i need reassurance on this, thanks

2. ## Re: complex variable!

If $|u|$ denotes the absolute value of $u$, then $-|(-z)|$ and $-|{-z}|$ are the same expression, and it is not true that $-|{-z}|=z$ or $-|{-z}|=-z$ for all complex $z$.