X乘X减X减1等于0,x为何值?

来源:学生作业帮助网 编辑:六六作业网 时间:2024/07/05 12:21:23
X乘X减X减1等于0,x为何值?X乘X减X减1等于0,x为何值?X乘X减X减1等于0,x为何值?x*x-x-1=0.即,x^2-x-1=0(x-1/2)^2-1/4-1=0.(x-1/2)^2=5/4

X乘X减X减1等于0,x为何值?
X乘X减X减1等于0,x为何值?

X乘X减X减1等于0,x为何值?
x*x-x-1=0.
即,x^2-x-1=0
(x-1/2)^2-1/4-1=0.
(x-1/2)^2=5/4.
(x-1)=±√5/2.
x1=1+√5/2
x2=1-√5/2.