Question

x(x+y)(x-y)-x(x+y)^2 怎么做？

详细过程啊 谢谢。

Answer 1

x(x+y)(x-y)-x(x+y)^2（提取公因式：x(x+y）
=x(x+y)[(x-y)-(x+y)](合并同类项)
=x(x+y)*2y(整理)
=2xy(x+y)

Answer 2

x(x+y)(x-y)-x(x+y)^2（提取公因式：x(x+y）
=x(x+y)[(x-y)-(x+y)](合并同类项)
=x(x+y)*（-2y）(整理)
=-2xy(x+y)

Answer 3

x(x+y)[(x-y)-(x+y)]=-2xy(x+y)

Answer 4

x(x+y)(x-y)-x(x+y)^2
=x(x+y)[(x-y)-(x+y)]
=x(x+y)*-2y
=-2xy(x+y)