原式为:(x²-2x)(x²-2x+2)+1 =(x²-2x)[(x²-2x)+2]+1 =(x²-2x)²+2(x²-2x)+1 =(x²-2x+1)² =(x-1)^4
(x²-2x)²+2(x²-2x)+1=(x²-2x+1)²=(x-1)^4
是化简吗?