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~Mathematics Freaks~

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Topic: hav a try this!
square root of[(-2)^2] = (-2)^2^1/2

when 2s are cancelled down, ans is (-2).

On the other hand,

square root of[(-2)^2] = square root of 4 = 2.

Is (-2) = 2 ??
Mar 2, 2008
5:06 AM

Posted by kway poem

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How do you cancel the 2s?? I couldn't see clearly.
sorry.
Mar 4, 2008
2:13 AM

Posted by kyaw 

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Plz rite down that equ on a paper. then i hope u could c how they go within a look as my youngest sis might do.
Mar 4, 2008
5:58 AM

Posted by kway poem

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WELL...(-2)^2=4 and 2^2=4 but...2>(-2) the only thing they have in common is their distance from number zero...Ok?????
Mar 15, 2008
9:13 AM

Posted by Goutsou 

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so, is (-2)^2 = 4 ?
do u accept that ??
N, why ???
Mar 20, 2008
9:26 PM

Posted by kway poem

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ok then,
is square root of [(-2)^2] = (-2)^2^1/2 = (-2)???
Mar 24, 2008
6:12 AM

Posted by kway poem

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here's the reason...
we can't cancel down the 2s from (-2)^2^1/2
coz it works only when the base is positive
so, the right ans is 2
Apr 3, 2008
6:41 AM

Posted by kway poem

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We cannot erase the 2s because we need a non-negative base.With that you can also make many paradoxes such as
1=-1,1=-i,1=0 and many others.
Apr 19, 2008
3:00 AM

Posted by Tasos 

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