(x-1)^2+2x(x-1)=0
(x-1)(x-1)+2x(x-1)=0
(x-1)(x-1+2x)=0
(x-1)(3x-1)=0
x=1或者X=1/3
搞错了,上面是提取公因式法!下面才是因式分解法
(x-1)^2+2x(x-1)=0
X²-2x+1+2X²-2x=0
3X²-4x+1=0
(x-1)(3x-1)=0
x=1或者X=1/3
(x-1)^2+2x(x-1)=0
(x-1+2x)(x-1)=0
(3x-1)(x-1)=0
x1=1/3 x2=1
(X-1)(X-1+2X)=0
(X-1)(3X-1)=0
X=1 或1/3