Results 1 to 2 of 2

Thread: Square Root Equality

  1. #1
    GAH
    GAH is offline
    Newbie
    Joined
    Apr 2017
    From
    USA
    Posts
    1

    Square Root Equality

    The problem is to solve for x:

    Square Root Equality-aa.png
    OK. It seems simple enough. I said 31 is the answer.
    Isn't it true that:


    Square Root Equality-aa.png

    The answer is "no real number solutions".

    Why?
    Attached Thumbnails Attached Thumbnails Square Root Equality-aa.png  
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Super Member
    Joined
    Oct 2009
    From
    Brisbane
    Posts
    890
    Thanks
    199

    Re: Square Root Equality

    It is true that (6)^2=36 and (-6)^2 = 36

    BUT

    \sqrt {36} =6 and -\sqrt{36} = -6.

    The \sqrt{} sign represents the positive square root.

    The -\sqrt{} sign represents the negative square root.

    In other words, \sqrt{anything} will never be negative.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 5
    Last Post: Dec 2nd 2014, 03:53 PM
  2. Replies: 3
    Last Post: Oct 26th 2014, 05:43 PM
  3. Replies: 5
    Last Post: Jun 23rd 2012, 10:39 PM
  4. Square root inside square root equation
    Posted in the Algebra Forum
    Replies: 3
    Last Post: Oct 10th 2011, 04:17 PM
  5. Replies: 12
    Last Post: Nov 22nd 2008, 12:41 PM

/mathhelpforum @mathhelpforum