Results 1 to 3 of 3

Math Help - [SOLVED] Completing the Square

  1. #1
    Newbie
    Joined
    Jan 2010
    Posts
    4

    Question [SOLVED] Completing the Square

    I've got some exercises for completing the square but the way I've been shown to work it out doesn't work because halfing the three causes problems. Can anybody help me with these exercises?

    x^2 - 3x + 7

    x^2 - 3x + 4

    Thanks
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Master Of Puppets
    pickslides's Avatar
    Joined
    Sep 2008
    From
    Melbourne
    Posts
    5,234
    Thanks
    27
    Quote Originally Posted by beeohbee27 View Post
    I've been shown to work it out doesn't work because halfing the three causes problems.


    x^2 - 3x + 7
    Leave halving 3 as a fraction

    x^2 - 3x \left(+\frac{9}{4}\right)+ 7\left(-\frac{9}{4}\right)

    \left(x - \frac{3}{2}\right)^2 +\frac{19}{4}
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Newbie
    Joined
    Jan 2010
    Posts
    4
    Simple as that. I was thinking there may be some kind of way to get an answer in integers but I can see that this is the way to do it now.
    Thanks for your help.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. [SOLVED] Completing the Square
    Posted in the Algebra Forum
    Replies: 3
    Last Post: May 28th 2010, 03:49 PM
  2. [SOLVED] Completing the Square Problem?
    Posted in the Algebra Forum
    Replies: 2
    Last Post: March 11th 2010, 01:00 PM
  3. Completing the square
    Posted in the Algebra Forum
    Replies: 3
    Last Post: March 9th 2010, 06:57 PM
  4. [SOLVED] Completing the square
    Posted in the Pre-Calculus Forum
    Replies: 2
    Last Post: January 26th 2010, 09:09 AM
  5. [SOLVED] Completing the Square
    Posted in the Algebra Forum
    Replies: 1
    Last Post: September 11th 2008, 05:33 PM

Search Tags


/mathhelpforum @mathhelpforum