用配方法解方程 1.x²-2x-1=0 2.x²+3x+2=0 3.2x²-4x-1=0 4.3x²-2x+1=0
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/18 01:15:38
![用配方法解方程 1.x²-2x-1=0 2.x²+3x+2=0 3.2x²-4x-1=0 4.3x²-2x+1=0](/uploads/image/z/1559447-71-7.jpg?t=%E7%94%A8%E9%85%8D%E6%96%B9%E6%B3%95%E8%A7%A3%E6%96%B9%E7%A8%8B+1.x%26%23178%3B-2x-1%3D0+2.x%26%23178%3B%2B3x%2B2%3D0+3.2x%26%23178%3B-4x-1%3D0+4.3x%26%23178%3B-2x%2B1%3D0)
x){>egv><@
zjʆֺF
F0m
m#L D1B6P&Hzt hBl*lm|1HHAh&0SaR4J"4냤AL& 5!&$ف|
>
用配方法解方程 1.x²-2x-1=0 2.x²+3x+2=0 3.2x²-4x-1=0 4.3x²-2x+1=0
用配方法解方程 1.x²-2x-1=0 2.x²+3x+2=0 3.2x²-4x-1=0 4.3x²-2x+1=0
用配方法解方程 1.x²-2x-1=0 2.x²+3x+2=0 3.2x²-4x-1=0 4.3x²-2x+1=0
1.(x-1)²=2 x= ±√2+1
2 (x+2)(x+1)=0 x=-2 x=-1
3 (x-1)²=3/2 x=±√3/2 +1
4(3x-1)(x+1)=0 x=1/3 x=-1