AoPS Wiki:Article of the Day
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Today's featured article is complex number: “The complex numbers arise when we try to solve equations such as We know (from the trivial inequality) that the square of a real number cannot be negative, so this equation has no solutions in the real numbers. However, it is possible to define a number, |
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, such that 
. If we add this new number to the reals, we will have solutions to 
