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: Simple Factoring Problems

  1. Sep 6, 2006 #1
    Hello, I am having a few minor factoring problems. Answers are not matching the answer book. I will show you what I have done

    =p^2 - 2p +1 - y^2 -2yz - z^2

    =(p-1)^2 (-y-z)(y+z)

    (the answer book states (p-1+y+z)(p-1-y-z))

    I dont know how the got that


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

    =x^4 + 2x^2 +1

    answer says (x+1/x)^2

    help please
  2. jcsd
  3. Sep 6, 2006 #2


    User Avatar
    Science Advisor

    If you want to be correct, always multiply it out or substitute something in to see if you're right or not.

    You already know how to factor the first three terms into a squared term involving p. Can you do something similar with the last three terms?

    Not true--plug in some values to check. However, what IS true, is
    x^2 +2 +(1/x^2) = (x^4 + 2x^2 +1)/(x^2)
  4. Sep 6, 2006 #3
    thanks for the help on the first one

    for the second one i got to

    [(x^2+1) (x^2+1)]/x^2

    how does that get to

    Last edited: Sep 6, 2006
  5. Sep 6, 2006 #4


    User Avatar
    Science Advisor

Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Similar Threads for Simple Factoring Problems Date
Simple factoring question here: Thanks! Aug 30, 2012
Simple factoring question Jan 23, 2009
Simple factoring after differentiating. Nov 19, 2008
Yet another simple factorizing question Mar 1, 2008
Simple Factoring Problem Feb 20, 2007