Results 1 to 2 of 2

Thread: simplify radical

  1. September 26th 2008, 04:13 PM #1
    blame_canada100
    blame_canada100 is offline
    Member
    Joined
    May 2005
    From
    I LIVE IN QUEBEC,CANADA
    Posts
    82

    Cool simplify radical

    (-1 minus √-80) minus (3 + √-20)
    Follow Math Help Forum on Facebook and Google+
  2. September 26th 2008, 04:16 PM #2
    Prove It
    Prove It is offline
    MHF Contributor Prove It's Avatar
    Joined
    Aug 2008
    Posts
    10,264
    Thanks
    697
    Quote Originally Posted by blame_canada100 View Post
    (-1 minus √-80) minus (3 + √-20)
    (-1 - \sqrt{-80}) - (3 + \sqrt{-20}) = (-1 - i\sqrt{80}) - (3 + i\sqrt{20})

    = (-1 - i4\sqrt{5}) - (3 + i2\sqrt{5})

    = -1 - 3 - i4\sqrt{5} - i2\sqrt{5}

    = -4 - i6\sqrt{5}
    Follow Math Help Forum on Facebook and Google+
« positive divisors of 192 are also multiples of 6? | find the explicit formula for sequence »

Similar Math Help Forum Discussions

  1. simplify radical
    Posted in the Algebra Forum
    Replies: 3
    Last Post: April 6th 2009, 09:27 AM
  2. Simplify a Radical
    Posted in the Algebra Forum
    Replies: 1
    Last Post: November 12th 2007, 07:34 PM
  3. simplify radical
    Posted in the Algebra Forum
    Replies: 6
    Last Post: June 18th 2007, 02:09 PM
  4. simplify radical
    Posted in the Algebra Forum
    Replies: 3
    Last Post: May 13th 2007, 12:02 PM
  5. simplify radical
    Posted in the Algebra Forum
    Replies: 4
    Last Post: May 3rd 2007, 06:12 PM

Search Tags


/mathhelpforum @mathhelpforum