Mathematical puzzle: 2=3 !

creative_35 · May 10, 2006

2=3

figure out what's wrong.

IanP · May 10, 2006

Re: 2=3

The problem lays in the line where someone is trying to find the square root of a negative number ..
For the explenation why it can't be done with real numbers goto:
https://mathforum.org/library/drmath/view/52613.html

Regards,
IanP

maNBA · May 10, 2006

2=3

interesting...

LouisSheffield · May 10, 2006

2=3

The wrong line is the one with the equal sign on the left. Though that second line (chain of =) is true, it is not equal to the system in the line above it.

thendral · May 10, 2006

Re: 2=3

The solu. is given in attachment

gripen · May 11, 2006

Re: 2=3

creative_35 said:
figure out what's wrong.

it's simple

sqrt( a ^ 2 ) = |a|

so

sqrt( (2-5/2)^2 )= |-1/2| = 1/2

and
sqrt( (3-5/2)^2 )= | 1/2 | = 1/2

any question?
byez

Mathematical puzzle: 2=3 !

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