用配方法:6x²+x-1=0,3x²-4x-6=0,3x²-2x-1=0前一次点错了,真心不好意思.急.55,在线等还有一题:3x²-6x+1=0
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/22 01:40:24
![用配方法:6x²+x-1=0,3x²-4x-6=0,3x²-2x-1=0前一次点错了,真心不好意思.急.55,在线等还有一题:3x²-6x+1=0](/uploads/image/z/1641886-70-6.jpg?t=%E7%94%A8%E9%85%8D%E6%96%B9%E6%B3%95%EF%BC%9A6x%26%23178%3B%2Bx-1%3D0%2C3x%26%23178%3B-4x-6%3D0%2C3x%26%23178%3B-2x-1%3D0%E5%89%8D%E4%B8%80%E6%AC%A1%E7%82%B9%E9%94%99%E4%BA%86%2C%E7%9C%9F%E5%BF%83%E4%B8%8D%E5%A5%BD%E6%84%8F%E6%80%9D.%E6%80%A5.55%2C%E5%9C%A8%E7%BA%BF%E7%AD%89%E8%BF%98%E6%9C%89%E4%B8%80%E9%A2%98%EF%BC%9A3x%26%23178%3B-6x%2B1%3D0)
用配方法:6x²+x-1=0,3x²-4x-6=0,3x²-2x-1=0前一次点错了,真心不好意思.急.55,在线等还有一题:3x²-6x+1=0
用配方法:6x²+x-1=0,3x²-4x-6=0,3x²-2x-1=0
前一次点错了,真心不好意思.
急.55,在线等
还有一题:3x²-6x+1=0
用配方法:6x²+x-1=0,3x²-4x-6=0,3x²-2x-1=0前一次点错了,真心不好意思.急.55,在线等还有一题:3x²-6x+1=0
6x²+x-1=0
x²+x/6=1/6
x²+x/6+(1/12)²=1/6+(1/12)²
(x+1/12)²=25/144
x+1/12=±5/12
x=5/12-1/12=1/3或x=-5/12-1/12=-1/2
3x²-4x-6=0
x²-4x/3=2
x²-4x/3+(2/3)²=2+4/9
(x-2/3)²=22/9
x-2/3=±(√22)/3
x=(2±√22)/3
3x²-2x-1=0
x²-2x/3=1/3
x²-2x/3+(1/3)²=1/3+(1/3)²
(x-1/3)²=10/9
x-1/3=±(√10)/3
x=(1±√10)/3
3x²-6x+1=0
x²-2x=-1/3
x²-2x+1=1-1/3
(x-1)²=2/3
x-1=±(√6)/3
x=1±(√6)/3