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Math Help - Prove this solution??

  1. #1
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    Prove this solution??

    prove that x^3 = x for x=0,1,-1 but not by just putting in the values of x??
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  2. #2
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    x^3 = x

    x^3 - x = 0

    x(x^2 - 1) = 0

    x(x - 1)(x + 1) = 0

    x = 0 or x-1=0 or x+1 = 0

    x = 0 or x=1 or x=-1.
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