已知z为虚数,|z|=根号下5 ,且z²+2z-(z的共轭复数)为实数 .1.求z的值 .2.若z为实系数ax²+bx+c=0的根,试求这个方程.麻烦写出细节.
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![已知z为虚数,|z|=根号下5 ,且z²+2z-(z的共轭复数)为实数 .1.求z的值 .2.若z为实系数ax²+bx+c=0的根,试求这个方程.麻烦写出细节.](/uploads/image/z/7114096-64-6.jpg?t=%E5%B7%B2%E7%9F%A5z%E4%B8%BA%E8%99%9A%E6%95%B0%2C%7Cz%7C%3D%E6%A0%B9%E5%8F%B7%E4%B8%8B5+%2C%E4%B8%94z%26%23178%3B%2B2z-%EF%BC%88z%E7%9A%84%E5%85%B1%E8%BD%AD%E5%A4%8D%E6%95%B0%EF%BC%89%E4%B8%BA%E5%AE%9E%E6%95%B0+.1.%E6%B1%82z%E7%9A%84%E5%80%BC+.2.%E8%8B%A5z%E4%B8%BA%E5%AE%9E%E7%B3%BB%E6%95%B0ax%26%23178%3B%2Bbx%2Bc%3D0%E7%9A%84%E6%A0%B9%2C%E8%AF%95%E6%B1%82%E8%BF%99%E4%B8%AA%E6%96%B9%E7%A8%8B.%E9%BA%BB%E7%83%A6%E5%86%99%E5%87%BA%E7%BB%86%E8%8A%82.)
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