大家看看我错在哪里?# WaterWorld - 未名水世界
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square root of -36 is 6i
square root of -4 is 2i
square root of -36 times square root of -4 is square root of -36x-4=144,
which is 12.
but 6ix2i=-12. So I proved 12=-12.
square root of -4 is 2i
square root of -36 times square root of -4 is square root of -36x-4=144,
which is 12.
but 6ix2i=-12. So I proved 12=-12.