Results 1 to 2 of 2

Math Help - simplifying expressions( using CLT) combine like terms

  1. #1
    Newbie
    Joined
    Dec 2008
    From
    none of your bussiness
    Posts
    1

    Question simplifying expressions( using CLT) combine like terms

    examples: 2+7x+1-7x

    9r+6-7
    2x+x
    8m-6m
    -7x-7x
    -8+5m=1=9m

    HELP!!!
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Super Member Aryth's Avatar
    Joined
    Feb 2007
    From
    USA
    Posts
    652
    Thanks
    2
    Awards
    1
    The method for these really aren't that hard, let's take one of your examples:

    2 + 7x + 1 - 7x

    1. Split up all like terms

    We can see that 2 and 1 are just regular numbers and that 7x and -7x have an x in common, so we will split them up that way, I like to use parentheses to avoid confusion:

    (2 + 1) + (7x - 7x)

    2. Solve the parentheses 1 by 1.

    We can see that 2 + 1 is three, but the 7x - 7x is tricky. For a moment, let's pretend that there is not an x there, we would then have:

    7 - 7

    This is obviously 0.

    7 - 7 = 0

    Now, let's put the x back in, this time we multiply everything by x, even the zero, since they are like terms:

    7x - 7x = 0x = 0 (Zero times anything is zero)

    And there you have it, we just put that where we put the (7x - 7x) in the problem:

    3 + 0 = 3

    Hope this helps.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Simplifying nCr terms
    Posted in the Discrete Math Forum
    Replies: 1
    Last Post: February 21st 2010, 02:36 PM
  2. Can I combine like terms?
    Posted in the Algebra Forum
    Replies: 2
    Last Post: April 23rd 2009, 03:52 PM
  3. Write the expressions in terms of cosine?
    Posted in the Trigonometry Forum
    Replies: 3
    Last Post: March 11th 2009, 12:27 PM
  4. A combine terms
    Posted in the Algebra Forum
    Replies: 1
    Last Post: May 6th 2007, 05:49 PM
  5. Simplifying expressions
    Posted in the Trigonometry Forum
    Replies: 5
    Last Post: January 13th 2007, 12:24 AM

Search Tags


/mathhelpforum @mathhelpforum