原式=x^4-(x^2-2x+1)=x^4-(x-1)^2=(x^2+x-1)(x^2-x+1) 原式=x^4-(x^2-2x+1)=x^4-(x-1)^2=(x^2+x-1)(x^2-x+1)
原式=x^4-(x^2-2x+1)=x^4-(x-1)^2=(x^2+x-1)(x^2-x+1)
x^4+x^2+2x-1=x^4-(x^2-2x+1)=x^4-(x-1)^2=(x^2+x-1)(x^2-x+1)
难道这不已经是最简?
要分解因式?