How can I solve this para Paradox?
$ -1={(-1)}^{1/2} {(-1)}^{1/2}={[(-1)(-1)]}^{1/2}=1$
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2Bound to be a duplicate, but your middle equality is unjustified for complex numbers – Henry Jan 28 '15 at 07:15
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or http://math.stackexchange.com/questions/3210/simple-complex-number-problem-1-1 – Henry Jan 28 '15 at 07:52
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or http://math.stackexchange.com/questions/144363/funny-complex-equality-1-1?lq=1 or many more – Henry Jan 28 '15 at 07:55