解方程:x2-2x-1=0.

来源:学生作业帮助网 编辑:六六作业网 时间:2024/05/27 12:21:01
解方程:x2-2x-1=0.解方程:x2-2x-1=0.解方程:x2-2x-1=0.x2-2x-1=0(x-1)^2=0x-1=0x=1.x²-2x=1x²-2x+1=2(x-1)

解方程:x2-2x-1=0.
解方程:x2-2x-1=0.

解方程:x2-2x-1=0.
x2-2x-1=0
(x-1)^2=0
x-1=0
x=1.

x²-2x=1
x²-2x+1=2
(x-1)²=2
x=1+√2 x=1-√2

x²-2x-1=0
(x-1)²=2
x-1=±√2
x1=1+√2 x2=1-√2

x2-2x-1=0.
x²-2x+1=2
(x-1)²=2
x-1=±√2
x1=1+√2, x2=1-√2