i.i=1
Asked by
| 19th Sep, 2008,
08:59: PM
Expert Answer:
you can not write 
-1 * -1 = (-1)(-1) = 1 =1
because square root of negative numbers is not defined.
thats -1 = i which is a imaginary no.
Answered by
| 19th Sep, 2008,
10:49: PM
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