用适当的方法解方程:(1)x(x-2)+x-2=0(2)x 2 -2x=2x+1

用适当的方法解方程:(1)x(x-2)+x-2=0(2)x 2 -2x=2x+1.
2024-12-02 16:50:31
推荐回答(1个)
回答1:

(1)x(x-2)+x-2=0
(x-2)(x+1)=0,
解得:x 1 =2,x 2 =-2;

(2)x 2 -2x=2x+1
x 2 -4x+4=1+4,
(x-2) 2 =5,
x-2=±
5

解得:x 1 =2+
5
,x 2 =2-
5