神马品牌网全国小学名称:一道计算题 急用
来源：百度文库 编辑：神马品牌网 时间：2024/05/11 16:23:08
x(x+1)(x-1)-x^2(x-1) 要步骤
=x(x^2-1)-x^3+x^2
=x^3-x-x^3+x^2
=x^2-x
=x(x-1)
=x(x^2-1)-x^2(x-1)
=x^3-x-x^3+x^2
=x^2-x
x(x+1)(x-1)-x^2(x-1)
=x(x^2-1)-x^3+x^2
=x^3-x-x^3+x^2
=x^2-x
x(x+1)(x-1)-x^2(x-1)
=(x^2+x)(x-1)-x^2(x-1)
=(x^2+x-x^2)(x-1)
=x(x-1)
我认为这样比较真确!
x(x+1)(x-1)-x^2(x-1)=x(x^2-1)-x^3+x^2=x^3-x-x^3+x^2=x^2-x
x(x+1)(x-1)-x^2(x-1)
=x（x^2-1）-x^3+x^2
=x^3-x-x^3+x^2
=-x（1-x）