• of course who said 2+2=4 who said my name is ed who said everything make your own world!
• Not really. However there are false proofs of untrue mathematical statements, based on false assumptions or faulty reasoning. For example, below is a 'proof' that 1=0 (http://answers.yahoo.com/question/index?qid=1006051531250) If you can prove that 1=0, then you can prove that 2+2=5, or indeed that practically anything equals anything else. Can you spot the fallacy? Let a & b each be equal to 1. Since a ^ b are equal, b^2 = ab (eq.1) Since a equals itself, it is obvious that a^2 = a^2 (eq.2) Subtract equation 1 from equation 2. (a^2) - (b^2) = (a^2)-ab (eq. 3) We can factor both sides of the equation: (a^2)-ab equals a(a-b). Likewise, (a^2)-(b^2) equals (a + b)(a - b) (Nothing fishy is going on here. This statement is perfectly true. Plug in numbers and see for yourself!) Substituting into the equation 3, we get (a+b)(a-b) = a (a-b) So far, so good. Now divide both sides of the equation by (a-b) and we get a + b = a b = 0 But we set b to 1 at the very beginning of this proof, so this means that 1 = 0
• Knock yerself out, but I won't buy it...
• -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
• No.
• Only if you strongly believe in it yourself without any prove!!!
• i don't know but i can prove 2+2 = 3.9999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999.......... lol
• Sure, if 2 REALLY equals 2.5, then 2+2=5
• Ya we have a way to proove 2+2=5 4-4=0 -(1) 10-10=0 -(2) hence R.H.S. is equal in both equation then we can write it as.. 4-4 = 10-10 2^2-2^2 = 10-10 a^2-b^2 = (a+b)(a-b) (2+2)(2-2)=10-10 (2+2)(2-2) = 5(2-2) taking 5 in common remove the same terms from both sides now we have "2+2=5" wait wait let me clear the problem the above solution is not correct because the value of zero is not exactly equal to zero. according to this property the given solution is wrong. thus we can say that it is impossible to proove 2+2=5
• Sure, if you can find a way to manipulate the whole origine of numbers.
• No, because 2+2=4 not five. There's no ambiguity in mathematics.
• 0=0(it is a fact) 0*4=0*5(both are equal to zero) dividing both sides by 0 0*4/0=0*5/0 4=5 2+2=5
• Sounds like some Common Core BS. No. 2+2 does NOT equal 5.
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