Asked by Anonymous
I'm confused. Apparently -|x| is different from -x. Could somebody explain??? (I used x for a substitute for numbers.)
Answers
Answered by
oobleck
|x| is always positive
|x| = x if x >= 0
|x| = -x if x < 0
So, -|x| is always negative
|3| = 3
|-3| = 3
-(|-3|) = -(3) which is x if x = -3, not -x
|x| = x if x >= 0
|x| = -x if x < 0
So, -|x| is always negative
|3| = 3
|-3| = 3
-(|-3|) = -(3) which is x if x = -3, not -x
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