# 1 + 1 = 0 ?

1. May 17, 2010

### drc4rd1n

helo..

We know that 1+1 = 2.

but try this out..there is some dummy things goes around here

Firstly, we denote
1 + 1 = 1 + $$\sqrt{1}$$
<=> 1 + $$\sqrt{(-1)(-1)}$$
<=> 1 + $$\sqrt{-1}$$$$\sqrt{-1}$$
<=> 1 + i*i
<=> 1 + (-1)
<=> 0 ??

how come 1+1=0 ?
and where is the mistake ?

Is it true 1 = $$\sqrt{1}$$ ?

2. May 17, 2010

### D H

Staff Emeritus
See [thread=134627]this thread[/thread], one of many, many, many, many other threads on this topic.

3. May 17, 2010

### xxChrisxx

EDIT:

Never mind, I was never good at maths. Didn't read what you put properly :P

4. May 17, 2010

### drc4rd1n

orait.thanks!

5. May 25, 2010

### dmatador

mod 2 :(

6. May 25, 2010

### Char. Limit

I was going to say the same...

1 + 1 = 0 mod 2

Share this great discussion with others via Reddit, Google+, Twitter, or Facebook