说明方程X²-(2M+1)X+2M²+3=0 无实数根要过程啊!在线等!
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/05 06:44:46
![说明方程X²-(2M+1)X+2M²+3=0 无实数根要过程啊!在线等!](/uploads/image/z/7090281-9-1.jpg?t=%E8%AF%B4%E6%98%8E%E6%96%B9%E7%A8%8BX%26%23178%3B-%EF%BC%882M%2B1%EF%BC%89X%2B2M%26%23178%3B%2B3%3D0+%E6%97%A0%E5%AE%9E%E6%95%B0%E6%A0%B9%E8%A6%81%E8%BF%87%E7%A8%8B%E5%95%8A%21%E5%9C%A8%E7%BA%BF%E7%AD%89%21)
说明方程X²-(2M+1)X+2M²+3=0 无实数根要过程啊!在线等!
说明方程X²-(2M+1)X+2M²+3=0 无实数根
要过程啊!在线等!
说明方程X²-(2M+1)X+2M²+3=0 无实数根要过程啊!在线等!
△=b²-4ac
= (2M+1)²-4*1*(2M²+3)
=4M²+4M+1-8M²-12
=-4M²+4M-12
=-(2M-1)²+1-12
=-(2M-1)²-11<0
所以方程X²-(2M+1)X+2M²+3=0 无实数根