1. Not finding help here? Sign up for a free 30min 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!

Multiplying Rational Expressions

  1. Apr 2, 2006 #1
    This is a question I have to do for tomorrow


    I just factor the tops and then cancel where I can. This is what I came up with:


    But the answer key says:


    What have I done wrong?
  2. jcsd
  3. Apr 2, 2006 #2
    You aren't factoring carefully enough. You've got leftover factors floating around. Write out ALL of the steps!


    [tex]=\frac{(2x+1)(2x+1)}{x} \times \frac{3x^4}{3(2x-1)(2x+1)}[/tex]

    NOW do your cancelling.

  4. Apr 2, 2006 #3
    Ouch. That hurt my pride. I forget to factor the factor usually, that's going to kill me one day.

    thanks for pointing out that pesky little mistake.
  5. Apr 3, 2006 #4
    Happens to the best of us. No worries, mate! :biggrin:

Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Multiplying Rational Expressions
  1. Rational Expression (Replies: 2)

  2. Rational Expressions (Replies: 3)