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!

Homework Help: Simplify fractions of polynomials

  1. Dec 8, 2004 #1
    Simplify (x+1)/(x-1) multiplied by (x+3)/(1-x^2) divided by (x+3)^2/(1-x)

    Im not sure how to factor the 1-x^2 and what to do with 1-x

    I dont know how to simplify this plz help someone.

    The answer to this question is 1/(x-1)(x+3)
    x cannot = 1,-1, and -3
  2. jcsd
  3. Dec 8, 2004 #2


    User Avatar
    Science Advisor
    Homework Helper

    Notice that 1-x^2 is a difference of squares.
  4. Dec 8, 2004 #3


    User Avatar
    Science Advisor
    Homework Helper

    Put in the form:
    [tex]\frac{(x+1)(x+3)(1-x)}{(x-1)(1-x)(1+x)(x+3)(x+3)} [/tex]
    Is it clearer now??
  5. Dec 8, 2004 #4
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook