菜鸟打印模板设置:一道计算题 急用

来源:百度文库 编辑:高考问答 时间:2024/05/13 07:05:27
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)