Does |x|=x?

DgrayMan · **Joined:** Sat, 21 Jan 2012 03:59:22 UTC **Posts:** 182

Does |x|=x? is this true? I thought it may be x=(+-)x 'plus or minus x'

garfield · **Posted:** Thu, 26 Jan 2012 23:44:01 UTC

DgrayMan wrote:

Does |x|=x? is this true? I thought it may be x=(+-)x 'plus or minus x'

$|x|=\pm{x}$

skeeter · **Posted:** Fri, 27 Jan 2012 00:10:40 UTC

DgrayMan wrote:

Does |x|=x? is this true? I thought it may be x=(+-)x 'plus or minus x'

if $x \ge 0$

|x| = -x

if

Shadow · **Posted:** Fri, 27 Jan 2012 06:35:21 UTC

DgrayMan wrote:

Does |x|=x? is this true? I thought it may be x=(+-)x 'plus or minus x'

The question doesn't make any sense, what is x? If we're being REALLY pedantic, I could even ask what is |*|, but since this is the algebra forum, I'll not go into other absolute values. Still, if x is a non-real complex number, it is neither of those things.

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Does |x|=x?

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