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Math Help - delta x

  1. #1
    Junior Member mathbuoy's Avatar
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    Cool delta x

    Is there a difference between (\delta x)^2 and \delta x^2 ?

    Someone told me they are the same but i doubt it.
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  2. #2
    Junior Member
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    The first one means (dx) all squared, the other means delta * x^2

    So unless delta is just a word meaning something, and doesn't hold a value, then they are both different.
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  3. #3
    MHF Contributor
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    To elaborate on Bruce's post, think of it like -3^2 versus (-3)^2, order of operations changes the result.

    \delta x^2 = \delta x^2

    (\delta x)^2 = \delta ^2 x^2
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  4. #4
    Junior Member Ziaris's Avatar
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    If \delta is simply another variable, then your question has already been answered. However if you were asking if (dx)^2=dx^2 where dx is a differential, then this is sometimes the case. You'll find that in many books (especially physics books) a squared differential is sometimes denoted as dx^2 rather than (dx)^2, or at least that is the case in my experience. If this is the case, then they are the same.
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