20151231, 07:20  #1 
Nov 2015
25_{10} Posts 
x^2 = 2 , is it true?
italian Language :
Secondo me esiste un numero razionale tale che x^2 = 2 ed è la radice quadrata di 0,2 che è 0,4472135955 , mi spiego meglio 2 e 0,2 rappresentano entrambi due unità , quindi x^2 = 2 è possibile perché chiede 2 unità e non il numero 2 inteso come numero intero , quindi 0,4472135955^2 = 0,2 = che appunto sono 2 unità , cosa ne pensate ? Google translate : I think there is a rational number such that x ^ 2 = 2 and is the square root of 0.2 that is 0.4472135955, I'll explain 2 and 0.2 are both two units, then x ^ 2 = 2 is possible because it requires 2 units and the number 2 is understood as an integer, then 0.4472135955 ^ 2 = 0.2 = 2 units that are in fact, what you think ? Last fiddled with by Ale on 20151231 at 07:22 
20151231, 08:40  #2 
Romulan Interpreter
Jun 2011
Thailand
2^{3}×23×53 Posts 
0.4472135955^2=0.20000000000003762025.
Try again. 
20151231, 08:49  #3 
Nov 2015
5^{2} Posts 
Google calculator is 0,2
0.2 = 2/10 of units? 2 = two units ? but is Always two Last fiddled with by Ale on 20151231 at 08:58 
20151231, 09:01  #4 
Romulan Interpreter
Jun 2011
Thailand
2^{3}×23×53 Posts 
Google calculator is a part of a world conspiracy, to cheat you. They want you to be stupid, so they can lead you easier. Take the pencil and multiply by yourself.

20151231, 09:10  #5 
Nov 2015
5^{2} Posts 
thank you very much

20151231, 11:26  #6 
Nov 2015
19_{16} Posts 
^{^2} = 2
Last fiddled with by Ale on 20151231 at 11:36 
20151231, 13:20  #7 
"Forget I exist"
Jul 2009
Dumbassville
8384_{10} Posts 

20151231, 21:05  #8 
Nov 2015
5^{2} Posts 
Sorry , yes
Last fiddled with by Ale on 20151231 at 21:06 Reason: wrong 
20151231, 22:39  #9 
Aug 2015
2×3^{3} Posts 
Not just Google, but the accursed IEEE and their "floating point formats", aka introducing hidden errors everywhere to slow down technological progress!

20160101, 02:19  #10 
∂^{2}ω=0
Sep 2002
República de California
2D89_{16} Posts 
Ah, nothing like a hilarious jokethread to end the year with.
Continuing with the good fun, OP banned until he satisfactorily completes the elementary proof of the irrationality of sqrt(2) along the lines which I PMed him (this is still very basic, but different than the 'classical' ancientGreekera proof, to ensure he can't just copy/paste an answer.) I cc'ed the other mods on my banPM to him containing his unban homework assignment. Consider it incentivization to actually learn some basic maths. 
20160102, 12:01  #11 
"Nathan"
Jul 2008
Maryland, USA
5·223 Posts 
Come on now, everybody knows that . Don't you know anything about Roman numerals?
Last fiddled with by NBtarheel_33 on 20160102 at 12:01 
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