Results 1 to 3 of 3

Math Help - (-1(1-x)))^-2 algebra problem

  1. #1
    Member
    Joined
    Jul 2009
    From
    London
    Posts
    109

    (-1(1-x)))^-2 algebra problem

    I have
    \frac{1}{(x-1)^2}

    And to solve a binomial problem I need the x part in form (1 +/- x) - ie I need a positive 1.

    I can get to:
    \frac{1}{(-1(1-x))^2}

    But how can I remove one bracket so I am left with one bracket? The squaring makes it positive so am a bit stuck.

    Angus
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Super Member Quacky's Avatar
    Joined
    Nov 2009
    From
    Windsor, South-East England
    Posts
    901

    Re: (-1(1-x)))^-2 algebra problem

    You're right, and this is because (x-1)^2=[-(x-1)]^2=(1-x)^2.

    \frac{1}{(x-1)^2}

    =(x-1)^{-2}

    =(-1+x)^{-2}

    =(-1)^{-2}(1-x)^{-2}

    =(1-x)^{-2}
    Follow Math Help Forum on Facebook and Google+

  3. #3
    MHF Contributor
    Joined
    Dec 2007
    From
    Ottawa, Canada
    Posts
    3,094
    Thanks
    67

    Re: (-1(1-x)))^-2 algebra problem

    Quote Originally Posted by angypangy View Post
    (-1(1 - x)))^-2
    Should be:
    [-1(1 - x)]^(-2)
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. algebra problem
    Posted in the Algebra Forum
    Replies: 0
    Last Post: August 29th 2011, 07:35 AM
  2. Algebra problem...
    Posted in the Algebra Forum
    Replies: 2
    Last Post: August 31st 2009, 04:44 PM
  3. Algebra Problem
    Posted in the Algebra Forum
    Replies: 1
    Last Post: February 10th 2009, 04:43 PM
  4. algebra problem
    Posted in the Algebra Forum
    Replies: 6
    Last Post: December 13th 2008, 05:01 AM
  5. algebra problem world problem
    Posted in the Algebra Forum
    Replies: 2
    Last Post: May 21st 2007, 03:35 PM

Search Tags


/mathhelpforum @mathhelpforum