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Math Help - need some help

  1. #1
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    need some help

    Thank you very much ThePerfectHacker. Oops, I accidentally deleted my post, was trying to edit my proof. Anyway, many thanks to you, ThePerfectHacker
    Last edited by jackie; November 15th 2008 at 05:37 PM.
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  2. #2
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    Quote Originally Posted by jackie View Post
    I'm not sure about my proof because it seems that I didn't show both ways because this is an iff statement.


    One side of the proof is obvious. If x^4 \equiv a is solvable then (x^2)^2 \equiv a and so x^2\equiv a is solvable.
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  3. #3
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    Thank you ThePerfectHacker. So, what I did was irrelevant and not really related to the proof?
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  4. #4
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    Quote Originally Posted by jackie View Post
    Thank you ThePerfectHacker. So, what I did was irrelevant and not really related to the proof?
    You proved if x^2 \equiv a(\bmod p) has a solution then x^4 \equiv a(\bmod p).
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