Results 1 to 4 of 4

Math Help - math

  1. #1
    uma
    uma is offline
    Newbie
    Joined
    Sep 2009
    Posts
    8

    Thumbs down math

    a^2 - 2a + 1 /2 from a ^2 + 2a - 1 / 2
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Flow Master
    mr fantastic's Avatar
    Joined
    Dec 2007
    From
    Zeitgeist
    Posts
    16,948
    Thanks
    5
    Quote Originally Posted by uma View Post
    a^2 - 2a + 1 /2 from a ^2 + 2a - 1 / 2
    It would help if you said what is meant to be done with these two expressions.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Member
    Joined
    Mar 2008
    Posts
    182
    I'm guessing

    a^2-2a+\frac{1}{2} - (a^2+2a-\frac{1}{2})

    You put all the a^2s together, all the parts with just a together, and then all numbers with no a together.

    So you have
    a^2-a^2= 0
    -2a - (2a) = -4a
    \frac{1}{2} - (-\frac{1}{2})= 1

    altogether giving

    -4a + 1
    Follow Math Help Forum on Facebook and Google+

  4. #4
    MHF Contributor

    Joined
    Apr 2005
    Posts
    16,396
    Thanks
    1847
    But he might well mean \frac{x^2+ 2a+ 1}{2}- \frac{x^2- 2a+ 1}{2}. That would be \frac{x^2- x^2+-2a-(=2a)+ 1- 1}{2} and I will leave it to the OP to reduce that.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 0
    Last Post: May 29th 2011, 01:57 AM
  2. Replies: 2
    Last Post: February 14th 2011, 03:31 AM
  3. Replies: 1
    Last Post: June 19th 2010, 11:05 PM
  4. Replies: 1
    Last Post: June 2nd 2010, 10:49 AM
  5. Replies: 2
    Last Post: February 15th 2010, 04:09 PM

Search Tags


/mathhelpforum @mathhelpforum