x1,x2为x^2+3x+1=0的两实数根,则x1^3+8x2+20=?能用特殊符号就用,不能就尽量美观点。1、3楼均错!
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![x1,x2为x^2+3x+1=0的两实数根,则x1^3+8x2+20=?能用特殊符号就用,不能就尽量美观点。1、3楼均错!](/uploads/image/z/13894407-63-7.jpg?t=x1%2Cx2%E4%B8%BAx%5E2%2B3x%2B1%3D0%E7%9A%84%E4%B8%A4%E5%AE%9E%E6%95%B0%E6%A0%B9%2C%E5%88%99x1%5E3%2B8x2%2B20%3D%3F%E8%83%BD%E7%94%A8%E7%89%B9%E6%AE%8A%E7%AC%A6%E5%8F%B7%E5%B0%B1%E7%94%A8%EF%BC%8C%E4%B8%8D%E8%83%BD%E5%B0%B1%E5%B0%BD%E9%87%8F%E7%BE%8E%E8%A7%82%E7%82%B9%E3%80%821%E3%80%813%E6%A5%BC%E5%9D%87%E9%94%99%EF%BC%81)
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