2+2=5 how is that possible?

Question

I herd a teacher gave this as homework

Answer 1

a = b
a² = ab
a² + a² - 2ab = ab + a² - 2ab
2(a² - ab) = a² - ab
2 = 1

ok here it is

2 = 1 + 1

x = 2 + 2 goes to

x = 2 + (1 + 1)

since 1 = 2

x = 2 + (1 + 2)

x = 2 + 3

x = 5

you can make 2+2=anything greater than or equal to 2

Answer 2

YES you can prove 2 + 2 = 5
all you have to do is Prove 3=2
This seems to be an anomaly or whatever you call in mathematics.
It seems, Indian scientist Ramanujam found it but never disclosed it during his life time and that it has been found from his dairy.
See this illustration:
-6 = -6
9-15 = 4-10
Adding 25/4 to both sides:
9-15+ (25/4) = 4-10+ (25/4)
Changing the order
9+ (25/4)-15 = 4+ (25/4)-10
(This is just like: a square + b square - two a b = (a-b) square.)
3 square + (5/2) square - 2 * 3 * 5/2 = 2 square + (5/2) square - 2 * 2 *5/2

So it can be expressed as follows:

(3-5/2)(3-5/2) = (2-5/2) (2-5/2)

Taking positive square root on both sides:

3 - 5/ 2 = 2 - 5/2

Cancel 5/2 on each side

3 = 2 >>>>> call this equation [2]

Now take 2 + 2 = 5 >>>>>>>>>> call this equation [1]

now ues the value from Eqn. [2] and substitute in Eqn. [1]
What do you have:

5 = 3 + 2 = 2 + 2 = 3 + 3 = 6

The anomaly lies in the second last step--i.e., taking the positive square root. If the equation is rearranged as {(3-5/2) + (2-5/2)} .{(3-5/2) -(2/5/2)} = 0, then, one get (5-5).(1) =0, which is universally true.

Answer 3

vedio land has one problem in his eqations
when he gets positive square root out of both sides he will have
3-5/2=5/2-2
u cannot have 2-5/2(=-1/2) out of positive sqrt of (2-5/2)^2
The problem of gary g is that u cannot divide any number(or equation) by 0 while a^2-ab=0.
Regarding ur question: was he a math teacher or a teacher on philosophy who gave it as a homework

Answer 4

It depends on the yield of any or both of the 2s. if the yield is more, then it might be 2+2=5 or 6 or 4.5 or 4.2345676354758, I mean anything as a result. But if yield is less, then the result might be 2+2=3 or 3.5 or less than 4.

Answer 5

For extremely large values of 2.
The phrase "two plus two make five" (or "2 + 2 = 5") is sometimes used as a succinct and vivid representation of an illogical statement, especially one made and maintained to suit an ideological agenda.

Answer 6

It is a phrase used to illustrate error, brainwashing (Orwwell's 1984) and synergy. The only time it ever actually works is in brainstorming. If one person has 2 ideas and another has 2 ideas sometimes they can create a synthesis 5th idea.

Answer 7

Have you read George Orwell's book "1984"?
The antagonists try to brainwash the protagonist into believing that 2+2=5.
They finally torture him until he DOES believe it.

I guess that teacher has some torturous math lesson in mind...

Answer 8

when the 2 is really a 3?

Answer 9

teacher might have assumed 2 as 3!!

Answer 10

Yeah, right.
What do we need math for?
Customer: How much do I owe you?
Clerk: $10+$9.99*2=0
You owe me absolutely nothing. They're free!!!!!

a = b
a² = ab
a² + a² - 2ab = ab + a² - 2ab
2(a² - ab) = a² - ab
2*0 = 0
0 = 0