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きょすう
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An imaginary number, or 'kyosu', is not a real number, but refers to a number whose square root is a negative number.
An imaginary number, or 'kyosu', is not a real number, but refers to a number whose square root is a negative number.
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きょすうは、実数ではなく、平方根が負の数になる数のことを指します。
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