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X2 may refer to: ==Mathematics== * Square (algebra), also known as the "algebraic square", a concept in algebra * Chi-squared distribution, a theoretical probability distribution widely used in inferential statistics 抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「X2」の詳細全文を読む スポンサード リンク
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