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Math Help - Fractional Equality

  1. #1
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    Fractional Equality

    How does
    1 - \frac{8}{x^3} = \frac{x^3-8}{x^3} ?

    Pretty rusty..
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  2. #2
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    e^(i*pi)'s Avatar
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    1 = \dfrac{x^3}{x^3}

    Now they have the same denominator you can subtract
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  3. #3
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