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    HNICOLE's Avatar
    HNICOLE Posts: 1, Reputation: 1
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    #1

    Mar 3, 2009, 11:47 AM
    What is the answer to this radcal expression
    square root of X^8 over 81Y^7
    galactus's Avatar
    galactus Posts: 2,271, Reputation: 282
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    #2

    Mar 3, 2009, 01:13 PM
    Is that or ?

    I assume the former?

    Then, use the exponent laws. Remember, the exponents of exponents multiply.



    8 times 1/2 is 4, so we have in the numerator:

    In the denominator, what's the square root of 81? What is 7 times 1/2?

    Can you get it now?
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