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Math Help - Explain how this equals this

  1. #1
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    Explain how this equals this

    This a homework problem can someone explain how this

    \frac{t-\frac{1}{t}}{2}


    equals this



    \frac{t^2-1}{2t}
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  2. #2
    Junior Member
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    make a common denominator for the numerator fraction

    x - (1/x)

    common denominator is x, so..

    ((x^2 - 1) / x) all divided by 2, so..

    (x^2 - 1 /2x)
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  3. #3
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    Hello, sk8erboyla2004!

    Can someone explain how . \frac{t-\frac{1}{t}}{2} .equals . \frac{t^2-1}{2t}

    Multiply by \frac{t}{t}\!:\quad\frac{t}{t}\cdot\frac{t - \frac{1}{t}}{2} \;=\;\frac{t^2-1}{2t}

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  4. #4
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    well sure if you wanna do it the eeeasy way
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