Results 1 to 2 of 2

Math Help - Subtracting Polynomials

  1. #1
    Newbie
    Joined
    Mar 2012
    Posts
    8

    Subtracting Polynomials

    2012-04-08144208.jpg picture by King_Bradley - Photobucket

    You try 4

    First thing I do is distribute the - to the second paranthesis so I get 3h^2-h+4

    Then I do

    -7h^2-8h+1
    PLUS
    3h^2-h+4

    To get

    -4h^2-9h+5

    Wrong answer, I try subtracting


    -7h^2-8h+1
    minus
    3h^2-h+4
    ______________
    -10h^2-7h+5

    What am I doing wrong?
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    skeeter's Avatar
    Joined
    Jun 2008
    From
    North Texas
    Posts
    11,688
    Thanks
    447

    Re: Subtracting Polynomials

    (7h^2 - 8h + 1) - (-3h^2 + h - 4) =

    note that the subtraction changes the sign of each term in the second trinomial ...

    7h^2 - 8h + 1 + 3h^2 - h + 4 =

    combine like terms ...

    10h^2 - 9h + 5
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Adding and Subtracting Polynomials?
    Posted in the Algebra Forum
    Replies: 3
    Last Post: December 15th 2009, 01:34 PM
  2. subtracting powers?
    Posted in the Algebra Forum
    Replies: 2
    Last Post: July 2nd 2009, 04:17 AM
  3. subtracting polynomials
    Posted in the Algebra Forum
    Replies: 6
    Last Post: March 25th 2008, 12:05 PM
  4. #1 Graph ellipse. #2 Subtracting polynomials.
    Posted in the Pre-Calculus Forum
    Replies: 4
    Last Post: April 5th 2007, 07:08 AM
  5. subtracting volume
    Posted in the Math Topics Forum
    Replies: 1
    Last Post: February 1st 2007, 10:33 PM

Search Tags


/mathhelpforum @mathhelpforum