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Thread: simplify the expression

  1. May 21st 2012, 09:16 AM #1
    user38989
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    simplify the expression

    X^14
    ______
    X^7

    They only two I could think of is X^7 or X^21.
    The correct answer would be wonderful thanks
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  2. May 21st 2012, 09:59 AM #2
    skeeter
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    Re: simplify the expression

    \frac{x^a}{x^b} = x^{a-b}
    Thanks from Reckoner and HallsofIvy
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  3. May 22nd 2012, 10:20 AM #3
    HallsofIvy
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    Re: simplify the expression

    Or:
    \frac{X^{14}}{X^7}= \frac{X(X)(X)(X)(X)(X)(X)(X)(X)(X)(X)(X)(X)(X)}{X( X)(X)(X)(X)(X)(X)}= X(X)(X)(X)(X)(X)(X)= X^7
    because the 7 "X"s in the denominator cancel 7 of the 14 "X"s in the numerator leaving 14- 7= 7 "X"s.
    Last edited by HallsofIvy; May 22nd 2012 at 10:22 AM.
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