Question

初二一道提取公因式的题目[x+y-4xy÷(x+y)]×[x+y+4xy÷(x-y)]化简、提取公因式 、

Answer 1

[x+y-4xy÷(x+y)]×[x+y+4xy÷(x-y)]

=(x-y)^2/(x+y)×(x^2-y^2+4xy)/(x-y)

=(x-y)(x^2-y^2+4xy)/(x+y)