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    This proves my A-Level Maths teacher was wrong!!!!!

    Proof that 1 = 2


    (for those that don't know, the little "^" means to the power of, as in 2^2, 2 squared)


    If a=1 and b=1 then...


    a^2 - b^2 = 0

    and

    a^2 - ab = 0



    ...therefore...


    a^2 - ab = a^2 - b^2



    ...and by factorising...


    a(a-b) = (a+b)(a-b)



    ...and then dividing by (a-b)...


    a = a+b



    ...therefore...


    1=2



    Done.

    AS YOUR MATH TEACHER WOULD SAY FAIL FAIL FAIL
    - SpecialK

    20 Comments

    [SIZE="3"]Oh i see!![/SIZE]





    [SIZE="1"]Not![/SIZE]

    wrong!

    a^2 b^2 = 0

    Doesn't that equal 1?

    Not sure if this is a joke or supposed to be true???

    Original Poster

    guerilla;2248109

    wrong!



    follow the math, it's infallible

    Original Poster

    [quote=Benjimoron;2248115]a^2 b^2 = 0

    Doesn't that equal 1?[quote]

    sorry, i left out some minus signs. :oops:

    let me fix it.



    Edit: Fixed now, sorry! :oops:

    see i told you it was wrong!

    Original Poster

    guerilla;2248137

    see i told you it was wrong!


    yeah, sorry about that.:oops:

    but it's right now :thumbsup:

    you cant divide something by zero though

    2nd equation is still wrong:oops:

    "...and then dividing by (a-b)..."

    WRONG!

    You can't divide something by zero, I looked it up!

    a = a+b is not 1=2!

    its a - a = b
    then b=0 which is not 1!

    you have to finish solving the equation, not directly substitute it with your assumption that a=1 and b=1

    what the.......

    :lol:

    The fun I used to have trying to prove to people that x/0 = I keep the remainder ;-)

    In Equation 3:

    [CENTER]a^2 - ab = a^2 - b^2 [/CENTER]

    you are proving that 0 = 0.

    From that point you can do almost any damn thing!

    Looks cool, though.

    If a,b=1 then a-b=0 and you can't divide by zero!

    http://halshop.files.wordpress.com/2007/03/phpw9jvl0pm.jpg

    Your assumption is flawed. Just because

    a^2 - b^2 resolves to zero
    and
    a^2 - ab resolves to zero

    does not mean that

    a^2 - b^2 equals a^2 - ab

    It's like saying
    ab = 0
    and
    ac = 0
    therefore
    b = c

    No, because a could equal 0

    actually,

    either a=1 and b=-1 or vice versa

    then it works.:whistling:

    what you have here is known as the long tail of knowledge. Where someone can state something and as a result of the internet other people with more knowledge correct them.

    For example, NASA released some figures regarding a shuttles engine claiming it did this that and the other, and someone one on a blog saw it all and was like WRANG and corrected it all.

    brillinat

    I didn't understand past the second line!

    I don't think in algebra you can designate the 2 variables 'a' and 'b' with the same number!
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