prove me wrong.

[Acidic]

let X=1

X=1
X^2=1
X^2 -1 = 0
(X+1)(X-1) = 1 (difference of two squares)
(X+1) = 1 (divide both sides by (X+1))
put X=1 in and:
(1+1) = 1
2 = 1?????
Where is the error?

Thios one took me a while to figure out, then, when I saw the light, I kicked myself to hard I convinced myself never to kick myself again.

[DiGiTaIErRoR]

(X+1)(X-1) = 1

2*0<> 1

should be

(X+1)(X-1) = 0

[Acidic]

well spoted, should be:

X=1
X^2=1
X^2 -1 = 0
(X+1)(X-1) = 0 (difference of two squares)
(X+1) = 0 (divide both sides by (X+1))
put X=1 in and:
(1+1) = 0
2 = 0?????

There is obviously still a mistake somewhere

[DiGiTaIErRoR]

Also... x+1=x should be obviously false. Unless x = infinity!

[DiGiTaIErRoR]

Ok.. so

(X+1) = 1

is wrong.

Especially when stated with(divide both sides by (X+1))

Should become...

(x-1) = 0/(x+1)

and if x = 1...

0 = 0

[Acidic]

Damn it I'm too tired. Right, I'm gonna get the question right this time.

X=1
X^2=1
X^2 -1 = 0
(X+1)(X-1) = 0 (difference of two squares)
(X+1) = 0 (divide both sides by (X-1))
put X=1 in and:
(1+1) = 0
2 = 0?????

Damnit, I've gone wrong again, but I don't know where. When I did this myslef the last read 2=1. Damn it.

[DiGiTaIErRoR]

LOL.

You can divide anything by 0; 0/(x-1)=0/0=undef.

If you do, it's undefined.

So, really..

2=undef.

Which makes the equation bogus.

[Acidic]

You can divide anything by 0; 0/(x-1)=0/0=undef.

I hope you meant:
You can't divide anything by 0; 0/(x-1)=0/0=undef.

as that would have been right. It fooled me for ages, I though of course you can divide by (X-1) as long as you do it to both sides. I never twigged that (X-1) was in fact 0. Maybe I need sleep.

[DiGiTaIErRoR]

You can... but like I said, it's undefined.

Like you... you did, and we saw what happened.

[wossname]

OK, I got home from work, had a pint.

watched a Dvd while drinking 2.5 pints per hour

that was 3 1/4 hours ago, how many pints have i had to drink?

if you can be arsed to work it out then you can have a drink on me because you're not having a fun enough time!







The answer is: enough, i think. Puntcuation is suffering.