Results 1 to 5 of 5

Math Help - Please explain

  1. #1
    Newbie
    Joined
    Oct 2008
    Posts
    11

    Please explain

    (x – 2)^2

    Please explain how to expand.

    Last edited by mr fantastic; November 26th 2008 at 02:10 PM. Reason: Clarifification provided by the OP
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Senior Member euclid2's Avatar
    Joined
    May 2008
    From
    Ottawa, Canada
    Posts
    400
    Awards
    1
    Quote Originally Posted by Elli View Post
    (x 2)^2



     (x-2)^2 = (x-2)(x-2) = x^2-2x-2x+4 = x^2-4x+4

    make two brackets then foil.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Junior Member
    Joined
    Aug 2008
    Posts
    38
    Quote Originally Posted by Elli View Post
    (x – 2)^2

    Please explain how to expand.

    hi
    it is like (a-b)^2 ^-whole square
    (a-b)^2=a^2-2ab+b^2 (^power2)
    (x-2)^2=x^2-2*x*2+2^2
    (x-2)^2=x^2-4x+4

    ok
    Last edited by mr fantastic; November 26th 2008 at 02:12 PM. Reason: Edited quote to match edit of original post
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Newbie
    Joined
    Nov 2008
    Posts
    12

    Unless specifically asked to do foil

    I would learn to use saranya's method ASAP. Saves you a ton of time on tests and on future problems.
    Follow Math Help Forum on Facebook and Google+

  5. #5
    Newbie
    Joined
    Oct 2008
    Posts
    11

    Thank you!

    Thank you for your help .. euclid2, petergunz and saranya
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Explain this!
    Posted in the Math Challenge Problems Forum
    Replies: 4
    Last Post: December 30th 2010, 02:41 PM
  2. How can i explain???
    Posted in the Number Theory Forum
    Replies: 2
    Last Post: June 6th 2010, 03:37 PM
  3. Can someone explain this to me?
    Posted in the Calculus Forum
    Replies: 1
    Last Post: August 29th 2009, 07:11 AM
  4. Can someone explain how I do this one?
    Posted in the Trigonometry Forum
    Replies: 1
    Last Post: July 15th 2008, 07:22 PM
  5. Can you explain to me how to do this?
    Posted in the Algebra Forum
    Replies: 1
    Last Post: June 8th 2008, 02:55 AM

Search Tags


/mathhelpforum @mathhelpforum