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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

    shmoe

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

    dextercioby

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    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
    THANKS YES ITS CRYSTAL CLEAR :tongue2:
     
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