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# proof that 2+2 = 5 weird

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#### lightning r fun

##### Member level 1
Which is the same as: 16-36 = 25-45
Which can also be expressed as: (2+2) 2 (9 X (2+2) = 52) 9 X 5
Add 81/4 to both sides: (2+2) 2 (9 X (2+2) + 81/4 = 52) 9 X 5 + 81/4
Rearrange the terms: ({2+2}) 9/2) 2 = (5-9/2) 2
Ergo: 2+2 - 9/2 = 5
Hence: 2 + 2 = 5

#### keremcant

##### Member level 5
"(2+2) 2 (9 X (2+2) = 52) 9 X 5" , ı didn't understand what this is. I guess there is a problem with the paranthesis or? where is the equal sign? what is "52) 9 x 5"?

bond91

### bond91

Points: 2

#### lostinxlation

"(2+2) 2 (9 X (2+2) = 52) 9 X 5" , ı didn't understand what this is. I guess there is a problem with the paranthesis or? where is the equal sign? what is "52) 9 x 5"?
The title says weird, so no surprise there are weird operators that no one could understand. May be it's a math written in the bible.

Teg-Men

### Teg-Men

Points: 2

#### _Eduardo_

##### Full Member level 5
OK

Which is the same as: 16-36 = 25-45
OK

Which can also be expressed as: (2+2) 2 (9 X (2+2) = 52) 9 X 5
:shock:
Must have been written: (2+2)² - 9x(2+2) = 5² - 9x5

Add 81/4 to both sides: (2+2) 2 (9 X (2+2) + 81/4 = 52) 9 X 5 + 81/4
Must have been written: (2+2)² - 9x(2+2) + 81/4 = 5² - 9x5 + 81/4

Rearrange the terms: ({2+2}) 9/2) 2 = (5-9/2) 2
Must have been written: ((2+2) - 9/2)² = (5 - 9/2)²
[step a]

Ergo: 2+2 - 9/2 = 5
Must have been written: (2+2) - 9/2 = 5 - 9/2
[step b]

Hence: 2 + 2 = 5

Allelujah! you just discover what (-1/2)² = (1/2)² but -1/2 <> 1/2 (steps a and b)

Points: 2

Points: 2

### kingsha007

Points: 2

#### lightning r fun

##### Member level 1
thank you for clearing that up.
and for figuring out how to write the little 2.

#### _Eduardo_

##### Full Member level 5
Click on "Go Advanced" and use the special characters palette at right side.

Or press ALT 253 (this may not work according the character set selected)

sweetness.
thanks²

#### loren1daniel

##### Newbie level 1
Nice efforts, quite logical.
But i didn't understand one of its step i.e. (2+2) 2 (9 X (2+2) = 52) 9 X 5
How this comes?

#### lightning r fun

##### Member level 1
here is one that works better:
-20=-20 (it is fact)
16-36=25-45 (16-36=-20,25-45=-20)
4^2-36 = 5^2-45 (4^2=16,5^2=25)
4^2-36 = 5^2-45
4^2-2.4.9/2 = 5^2-2.5.9/2 (2.4.9/2=36,2.5.9/2=45)
4^2-2.4.9/2 +(9/2)^2 = 5^2-2.5.9/2 +(9/2)^2 (adding both the sides (9/2)^2
[4-(9/2)]^2 = [5-(9/2)]^2 (let 4=a,9/2=b)
4-(9/2) = 5-(9/2)
4 = 5
2+2 = 5

---------- Post added at 11:35 ---------- Previous post was at 11:34 ----------

here's another one

Let x be a non-zero number, and set y=x. Thus:
x = y
x^2 = xy
x^2-y^2 = xy-y^2
(x+y)(x-y) = y(x-y)
x+y = y
2y = y
2 = 1
1 = 0
Now since 2+2 = 2+2+0 and we apply the lemma proof so that 0 = 1, 2+2+0 = 2+2+1 =5
THEREFORE
2+2 = 5

Points: 2

Points: 2

### n_sh

Points: 2

#### Communications_Engineer

the simplest solution to a problem is to make both sides 0 , that is what you're doing in line 3

0/0 = undefined.

#### Communications_Engineer

let x=0, then x/x =1 => inf = 1

DrWhoF

### DrWhoF

Points: 2

#### annapoorani

##### Junior Member level 3
super............. very cute..........

Last edited:

#### IanP

It's not cute ..
Square root of negative number or division by zero make your "maths" really weird ..

:wink:

DrWhoF

### DrWhoF

Points: 2

#### mrflibble

It's not cute ..
Square root of negative number or division by zero make your "maths" really weird ..

:wink:

One man's boring trivialities might be another one's amusement. ;-)

#### tlihu

##### Full Member level 6
a / a = 1, a <> 0
How about NaN / NaN = ?
NaN = Not a Number.

#### bond91

##### Newbie level 3
saying 0=0;
then 0*5 =0*4;
thus 4=5
things like this r complete bullshit....

#### KIK1RIK1

##### Newbie level 3
Square roots do funny things.

#### alexan_e

the equation comes to a point where [4-(9/2)]² = [5-(9/2)]²
This is where the error begins, this is not equal to [4-(9/2)] = [5-(9/2)]

you have to use square root at both sides to simplify
√[4-(9/2)]² = √[5-(9/2)]²

There is a special theorem that deals with this: SQRT(a²) = |a| (absolute value of a)

so the above equation becomes
|4-(9/2)| = |5-(9/2)|
|-0.5| = |0.5|
0.5 = 0.5

I'm afraid the magic is lost
Alex

jeffrey samuel

### jeffrey samuel

Points: 2

#### leex14

##### Newbie level 4
whoa what an info..but in one of the expression why do 81/4 need to be added in both sides:???:

-sorry guys but im not that good in numbers the thing is i got dizzy just by seeing those(except when the figures has money related:-D)

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