Quote:
Originally posted by Cuball
idd that's the spoof :-)
sqrt isn't defined for negative numbers :-)
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sqrt
is defined for negative numbers
sqrt(-1) = i
sqrt(-2) = 2i
etc.
the spoof is that
-1 * -1 = sqrt(-1) * sqrt(-1)
is false, not just in this instance using negative numbers, but it is false for all numbers except 0 and 1.
e.g.
4 * 4 != sqrt(4) * sqrt(4)