1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Simple algebra question

  1. Dec 3, 2007 #1
    I can't seem to see how this simplifies, having an algebra brain fart

    [tex]2(2-x)^2-x(2-x)^2- 2/3 (2-x)^3[/tex]

    [tex](2-x)(2-x)^2- 2/3 (2-x)^3[/tex]

  2. jcsd
  3. Dec 3, 2007 #2
    Let's replace (2-x) with A.
    Then we have 2A^2 - xA^2 - (2/3)A^3
    Then we get (2-x) A^2 - (2/3)A^3
    since A=2-x, this gives
    (A^3) - (2/3)A^3 = (1/3)A^3 ===> now just replace A with 2-x

  4. Dec 3, 2007 #3
    Thank you
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook