解由x(x-2)+x-2=0得x(x-2)+(x-2)=0,,,,,,,,提取公因式(x-2)得(x-2)(x+1)=0解得x=2或x=-1
x(x-2)+x-2=0x(x-2)+1*(x-2)=0(x-2)(x+1)=0 (提取公因式)
x-2=1*(x-2)合并公因式就可以了
x(x-2)+x-2=0x(x-2)+(x-2)=0(x-2)(x+1)=0x=2 or x=-1
X平方x3X一2=0