One for all the Maths brains out there...
alright, here goes...
x squared = x squared yes?
that means that...
x(x-x)=(x+x)(x-x)
the 2 (x-x)'s cancel each other out...
so it becomes....
x=(x+x)
now we expand it...
x=2x...
so therefore...
1=2
how can this be possible? try and work it out...
if it didn't make sense to you at all, then ill edit it for you...
Re: One for all the Maths brains out there...
Quote:
Originally posted by Bad Neighbour
alright, here goes...
x squared = x squared yes?
that means that...
x(x-x)=(x+x)(x-x)
the 2 (x-x)'s cancel each other out...
so it becomes....
x=(x+x)
now we expand it...
x=2x...
so therefore...
1=2
how can this be possible? try and work it out...
if it didn't make sense to you at all, then ill edit it for you...
(x-x) = 0. So you are dividing by 0 here:
x(x-x)=(x+x)(x-x)
You may NEVER divide by 0.
reason:
To divide a number by another number, means to find another number such that the first number times the second number equals the third number.
This also means that if:
12/4 = 3, that 3*4 = 12, which it is.
0 * 0 = 0
1 * 0 = 0
2 * 0 = 0
etc...
The first part of what I said earlier is true with 0/0 = 0, but the problem lies with the 2nd part which has more then just one answer ;).
edit:
Just found something nice on google.
Quote:
Dividing by Zero Can Get You into Trouble! If we persist in retaining such errata in our educational texts, an unwitting or unscrupulous person could utilize the result to show that 1 = 2 as follows:
(a).(a) - a.a = a2 - a2
for any finite a. Now, factoring by a, and using the identity
(a2 - b2) = (a - b)(a + b) for the other side, this can be written as:
a(a-a) = (a-a)(a+a)
dividing both sides by (a-a) gives
a = 2a
now, dividing by a gives
1 = 2, Voila!
This result follows directly from the assumption that it is a legal operation to divide by zero because a - a = 0. If one divides 2 by zero even on a simple, inexpensive calculator, the display will indicate an error condition.
Again, I do emphasis, the question in this Section goes beyond the fallacy that 2/0 is infinity or not. It demonstrates that one should never divide by zero [here (a-a)]. If one does allow oneself dividing by zero, then one ends up in a hell. That is all.
Source: http://home.ubalt.edu/ntsbarsh/zero/ZERO.HTM#rdivzerotr
Re: One for all the Maths brains out there...
Quote:
Originally posted by Bad Neighbour
alright, here goes...
x squared = x squared yes?
that means that...
x(x-x)=(x+x)(x-x)
the 2 (x-x)'s cancel each other out...
so it becomes....
x=(x+x)
now we expand it...
x=2x...
so therefore...
1=2
how can this be possible? try and work it out...
if it didn't make sense to you at all, then ill edit it for you...
I don't know what you were trying to pull here, but you got it wrong...
x ( x - x ) = ( x * x ) - ( x * x ) NOT ( x + x )( x - x )
x ( 0 ) = x^2 - x^2
0 = 0
How hard can that be...? :S