Results 1 to 2 of 2

Math Help - Surds please help

  1. #1
    Newbie
    Joined
    Oct 2008
    Posts
    2

    Question Surds please help

    HELP!! i need help with these
    Q1 Show that:
    2+1
    ----- = 3 +22
    2-1

    Q2
    5-1
    ----- = 3+5
    5-2

    Q3 express : in the form k5
    1 1
    ---- - ----
    35 220
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Junior Member
    Joined
    Oct 2008
    Posts
    61
    Multiply the first by (sqrt(2)+1)/(sqrt(2)+1) to get

    (sqrt(2)+1)^2/((sqrt(2)-1)(sqrt(2)+1)) = (sqrt(2)+1)^2/(sqrt(2)^2-sqrt(2)+sqrt(2)-1) = (2+2sqrt(2)+1)/1 = 3+2sqrt(2)

    The second and third go in exactly the same way.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. [SOLVED] Help with Surds
    Posted in the Algebra Forum
    Replies: 8
    Last Post: January 5th 2012, 03:08 PM
  2. Something to do with surds?
    Posted in the Algebra Forum
    Replies: 4
    Last Post: July 11th 2011, 10:33 AM
  3. surds
    Posted in the LaTeX Help Forum
    Replies: 3
    Last Post: June 4th 2009, 04:55 PM
  4. surds
    Posted in the Algebra Forum
    Replies: 2
    Last Post: June 4th 2009, 12:30 AM
  5. surds
    Posted in the Algebra Forum
    Replies: 1
    Last Post: May 29th 2009, 04:40 AM

Search Tags


/mathhelpforum @mathhelpforum