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Thread: Absolute Value 1

  1. #1
    Super Member harpazo's Avatar
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    Absolute Value 1

    Why does |a - b| not equal to |a| - |b|?
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  2. #2
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    Re: Absolute Value 1

    Quote Originally Posted by harpazo View Post
    Why does |a - b| not equal to |a| - |b|?
    See my other reply.
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  3. #3
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    Re: Absolute Value 1

    For one thing, |x- y| is never negative while |x|- |y| may be negative. Take, for example, x= 3, y= 5.
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  4. #4
    Super Member harpazo's Avatar
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    Re: Absolute Value 1

    |3 - 5| = |-2| = 2

    |3| - |5|

    3 - 5 = -2

    2 DOES NOT EQUAL -2.

    Two different expressions.
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