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asnaseer
Group Title
Puzzle: Who can spot what is wrong here?
Theorem: 4 = 5
Proof: 20 = 20
16  36 = 25  45
4^2  (9x4) = 5^2  (9x5)
4^2  (9x4) + 81/4 = 5^2  (9x5) + 81/4
(4  9/2)^2 = (5  9/2)^2
4  9/2 = 5  9/2
4 = 5
 one year ago
 one year ago
asnaseer Group Title
Puzzle: Who can spot what is wrong here? Theorem: 4 = 5 Proof: 20 = 20 16  36 = 25  45 4^2  (9x4) = 5^2  (9x5) 4^2  (9x4) + 81/4 = 5^2  (9x5) + 81/4 (4  9/2)^2 = (5  9/2)^2 4  9/2 = 5  9/2 4 = 5
 one year ago
 one year ago

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lgbasallote Group TitleBest ResponseYou've already chosen the best response.0
how did you get 20=20 from 4=5
 one year ago

Freyes Group TitleBest ResponseYou've already chosen the best response.3
It's a puzzle.
 one year ago

asnaseer Group TitleBest ResponseYou've already chosen the best response.0
The Theorem states 4 = 5 It is then followed by the proof
 one year ago

lgbasallote Group TitleBest ResponseYou've already chosen the best response.0
oh that
 one year ago

Freyes Group TitleBest ResponseYou've already chosen the best response.3
the third to last step
 one year ago

JakeV8 Group TitleBest ResponseYou've already chosen the best response.0
sqrt of neg?
 one year ago

asnaseer Group TitleBest ResponseYou've already chosen the best response.0
and what exactly is wrong with that step?
 one year ago

Freyes Group TitleBest ResponseYou've already chosen the best response.3
The step is squaring a negative 1/2 and the other is squaring 1/2
 one year ago

asnaseer Group TitleBest ResponseYou've already chosen the best response.0
which is fine, since (1/2)^2 = (1/2)^2
 one year ago

Freyes Group TitleBest ResponseYou've already chosen the best response.3
Yes but then the square root of that after is where the problem is
 one year ago

asnaseer Group TitleBest ResponseYou've already chosen the best response.0
correct :)
 one year ago

Freyes Group TitleBest ResponseYou've already chosen the best response.3
you're choosing the positive side
 one year ago

Freyes Group TitleBest ResponseYou've already chosen the best response.3
not the same negative part you're squaring
 one year ago

cwrw238 Group TitleBest ResponseYou've already chosen the best response.0
yes  well done frees
 one year ago

asnaseer Group TitleBest ResponseYou've already chosen the best response.0
it is essentially the same as saying: (1)^2 = (1)^2 therefore 1 = 1
 one year ago

asnaseer Group TitleBest ResponseYou've already chosen the best response.0
well spotted!
 one year ago

oldrin.bataku Group TitleBest ResponseYou've already chosen the best response.0
\[\pm[4\frac92]=\pm[5\frac92]\]
 one year ago
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