Results 1 to 3 of 3

Math Help - find the trick.

  1. #1
    Junior Member
    Joined
    Dec 2008
    Posts
    68

    Exclamation find the trick.

    x^2-x^2=x^2-x^2

    _factorize : (x+x)(x-x)=x(x-x)
    _samplify by (x-x): (x+x)=x
    _then : 2x=x
    _so 2=1
    how does it come that?????
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor

    Joined
    Aug 2006
    Posts
    18,616
    Thanks
    1579
    Awards
    1
    Quote Originally Posted by lebanon View Post
    x^2-x^2=x^2-x^2

    _factorize : (x+x)(x-x)=x(x-x)
    _samplify by (x-x): (x+x)=x_then : 2x=x
    _so 2=1
    how does it come that?????
    \left( {\forall x} \right)\left[ {x = x} \right]\; \Rightarrow \;\left( {\forall x} \right)\left[ {x - x = 0} \right]
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Super Member
    Joined
    Jun 2008
    Posts
    792
    Title should be renamed to "find the mistake."

    Here it is:
    divide by (x-x): (x+x)=x
    Division by zero is undefined.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Trick 4 solving 4 n
    Posted in the Algebra Forum
    Replies: 9
    Last Post: November 8th 2010, 04:46 PM
  2. Trick to evaluate this sum?
    Posted in the Discrete Math Forum
    Replies: 2
    Last Post: September 16th 2010, 05:22 PM
  3. trick to solve?
    Posted in the Number Theory Forum
    Replies: 3
    Last Post: June 18th 2010, 09:48 AM
  4. trick question for me!!!
    Posted in the Algebra Forum
    Replies: 5
    Last Post: June 1st 2007, 09:31 PM
  5. Trick Questions
    Posted in the Math Challenge Problems Forum
    Replies: 85
    Last Post: November 19th 2006, 04:18 AM

Search Tags


/mathhelpforum @mathhelpforum