Results 1 to 3 of 3

Math Help - stumped! rules for radicals/roots

  1. #1
    Newbie
    Joined
    Jan 2011
    Posts
    2

    stumped! rules for radicals/roots

    I'm on the last problem of a practice test and stuck i followed the sample problem in the book but isn't clicking....pardon the attachment not sure how to post symbols and such.

    stumped! rules for radicals/roots-snc00166.jpg
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Super Member
    earboth's Avatar
    Joined
    Jan 2006
    From
    Germany
    Posts
    5,830
    Thanks
    123
    Quote Originally Posted by roger90 View Post
    I'm on the last problem of a practice test and stuck i followed the sample problem in the book but isn't clicking....pardon the attachment not sure how to post symbols and such.

    Click image for larger version. 

Name:	SNC00166.jpg 
Views:	17 
Size:	176.9 KB 
ID:	20636
    1. Transform the terms into powers:

    \sqrt[4]{32xy^4} - y \cdot \sqrt[4]{162 xy^4} = \left(2 \cdot 2^4 \cdot x \cdot y^4  \right)^{\frac14} - y \cdot \left(2 \cdot 3^4 \cdot x  \right)^{\frac14}

    2. Factor out (2x)^{\frac14} and collect like terms in the bracket.

    3. You should come out with -y(2x)^{\frac14}
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Newbie
    Joined
    Jan 2011
    Posts
    2
    Thanks for the help.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Radicals; nth Roots
    Posted in the Pre-Calculus Forum
    Replies: 1
    Last Post: June 5th 2010, 05:33 PM
  2. Stumped!
    Posted in the Algebra Forum
    Replies: 1
    Last Post: August 14th 2009, 03:55 PM
  3. Stumped
    Posted in the Algebra Forum
    Replies: 1
    Last Post: September 9th 2008, 04:38 PM
  4. roots and radicals
    Posted in the Algebra Forum
    Replies: 1
    Last Post: August 4th 2008, 01:34 AM
  5. Rules for squares and square roots
    Posted in the Algebra Forum
    Replies: 0
    Last Post: October 17th 2006, 03:19 PM

/mathhelpforum @mathhelpforum