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  • Jan 14, 2010, 08:16 AM
    Dlakt
    algebra
    I need help simplifing this radical expression sqrt(24x^6y^11) sqrt is cubed (3) I need to simplify variables in nonnegative real numbers.

    can someone help me?
  • Jan 14, 2010, 10:57 AM
    ebaines

    Do you mean this:



    In working with exponents, remember these rules:



    Taking the square root of something is like raising it to the 1/2 power. So therefore:



    and:



    Do you see how this works? Now, complete the problem and post back with what you get.
  • Jan 14, 2010, 11:03 AM
    Dlakt

    No I am sorry the 3 is in front of the sqrt root.. I do not know how to do math symbols. Its not behind
  • Jan 14, 2010, 11:43 AM
    ebaines

    You mean this then:



    So rather than taking the square root, you are taking the cube root of whatever is under the square root symbol:



    Using the principles I outlined in my earlier post, can you take it from here?
  • Jan 14, 2010, 01:50 PM
    Dlakt

    for my answer I got 2x^2(2y^11)^1/3

    Is this right?
  • Jan 14, 2010, 01:56 PM
    ebaines

    Almost! How did you get that factor of 2 in front of the y?
  • Jan 14, 2010, 02:59 PM
    Dlakt

    so there is no 2 its just y^11?
  • Jan 14, 2010, 03:51 PM
    ebaines

    You need to think about that factor of 24 - what is it's cube root? One way to treat it is to change 24 into 8 * 3, and recognize that the cube root of 24 is therefore the cube root of 8 times the cube root of 3. Or:



    Hope this helps.
  • Jan 14, 2010, 04:51 PM
    Dlakt

    Thank you so much for your help. Best to you in all you do.

    Deborah

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