Results 1 to 4 of 4
Like Tree1Thanks
  • 1 Post By chiro

Math Help - rational expressions (word problem 1)

  1. #1
    Member
    Joined
    Feb 2013
    From
    Canada
    Posts
    131

    Post rational expressions (word problem 1)



    i got the wrong answer... where did i go wrong?
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    Joined
    Sep 2012
    From
    Australia
    Posts
    3,607
    Thanks
    591

    Re: rational expressions (word problem 1)

    Hey Mathnood768.

    Hint: You need to square both terms before adding them together (and finishing off by taking the square root). (x/2)^2 = x^2/4 for example.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Member
    Joined
    Feb 2013
    From
    Canada
    Posts
    131

    Re: rational expressions (word problem 1)



    i did what you said but im more off now
    Follow Math Help Forum on Facebook and Google+

  4. #4
    MHF Contributor
    Joined
    Sep 2012
    From
    Australia
    Posts
    3,607
    Thanks
    591

    Re: rational expressions (word problem 1)

    (x/2)^2 + (x-1/4)^2

    = x^2/4 + (x^2 - 2x + 1)/16
    = 4x^2/16 + (x^2 - 2x + 1)/16
    = (5x^2 - 2x + 1)/16

    Taking the square root of that gives us

    SQRT(5x^2 - 2x + 1)/4
    Thanks from Mathnood768
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. World Problem with Rational Expressions
    Posted in the Algebra Forum
    Replies: 2
    Last Post: March 4th 2010, 09:48 AM
  2. [SOLVED] Rational Expressions Problem
    Posted in the Math Topics Forum
    Replies: 2
    Last Post: February 21st 2009, 06:41 PM
  3. Replies: 3
    Last Post: December 18th 2008, 08:21 AM
  4. Rational Expressions (Problem Solving Q)
    Posted in the Algebra Forum
    Replies: 2
    Last Post: December 7th 2008, 03:21 PM
  5. Replies: 1
    Last Post: October 15th 2008, 05:56 PM

Search Tags


/mathhelpforum @mathhelpforum