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Math Help - Rational Exponents and Radicals

  1. #1
    Mad
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    Rational Exponents and Radicals

    Did I do these right?

    Simplify:

    129. Sqrt. y^14
    y^7

    131. - Sqrt. a^6
    -a^3

    141. Cubed Rt. 125b^15
    125b^5

    Before I continue, I want to make sure, firstly, that I understand what I'm doing and, secondly, that I'm distributing the fractions properly. For example:

    Cubed Rt. 125b^15

    I multiplied 1/3 and 15 and got 5. Should I have distributed 1/3 to the 125, too? ...Assuming I'm doing all this right...
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  2. #2
    Forum Admin topsquark's Avatar
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    Quote Originally Posted by Mad View Post
    Did I do these right?

    Simplify:

    129. Sqrt. y^14
    y^7

    131. - Sqrt. a^6
    -a^3

    141. Cubed Rt. 125b^15
    125b^5

    Before I continue, I want to make sure, firstly, that I understand what I'm doing and, secondly, that I'm distributing the fractions properly. For example:

    Cubed Rt. 125b^15

    I multiplied 1/3 and 15 and got 5. Should I have distributed 1/3 to the 125, too? ...Assuming I'm doing all this right...
    You did everything correctly. Don't do the distribution: it gives an incorrect answer.

    -Dan
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