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2100！
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现在积分是块大肥肉，欢迎你来侃吧灌水吧参与灌水！
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侃吧积分制度改革了。
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a^2+b^2=(a+bi)(a-bi)
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我们要高中才能学
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可能他们学得比较提前。
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初二……
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他几年级
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巨大八爪鱼已经学了复数了……
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囧，我现在还看不懂这些东西
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皆来自百度百科，不过应该概念没错。
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1777年瑞士数学家欧拉(Euler，或译为欧勒)开始使用符号i表示虚数的单位。而后人将虚数和实数有
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在平面直角坐标系中：
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(2)[imaginary part]：复数中a+bi，b不等于零时bi叫虚数。
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那这个I有神马特殊含义
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