Results 1 to 2 of 2

Math Help - factoring polynomial equations

  1. #1
    Newbie
    Joined
    Oct 2012
    From
    us
    Posts
    1

    factoring polynomial equations

    81x^4-256

    im working on a problem and need to factor the above equation. thanks for your help in advance.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    Prove It's Avatar
    Joined
    Aug 2008
    Posts
    11,519
    Thanks
    1404

    Re: factoring polynomial equations

    \displaystyle \begin{align*} 81x^4 - 256 &= \left( 9x^2 \right)^2 - 16^2 \\ &= \left( 9x^2 - 16 \right) \left( 9x^2 + 16 \right) \\ &= \left[ \left(3x \right)^2 - 4^2 \right] \left( 9x^2 + 16 \right) \\ &= \left( 3x - 4 \right) \left( 3x + 4 \right) \left( 9x^2 + 16 \right) \end{align*}
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Factoring a polynomial?
    Posted in the Algebra Forum
    Replies: 4
    Last Post: August 9th 2012, 10:05 PM
  2. Factoring Polynomial
    Posted in the Algebra Forum
    Replies: 3
    Last Post: June 12th 2009, 08:35 AM
  3. help factoring polynomial
    Posted in the Algebra Forum
    Replies: 2
    Last Post: September 10th 2008, 02:00 PM
  4. polynomial factoring
    Posted in the Algebra Forum
    Replies: 7
    Last Post: January 14th 2008, 12:28 PM
  5. Factoring polynomial help please
    Posted in the Algebra Forum
    Replies: 1
    Last Post: January 10th 2008, 10:10 PM

Search Tags


/mathhelpforum @mathhelpforum