(x四次方-8x2y2+16y四次方）÷（2y+x）2÷（x-2y) 要
问题描述：
(x四次方-8x2y2+16y四次方）÷（2y+x）2÷（x-2y) 要
答
(x^4-8x2y2+16y^4）÷（2y+x）2÷（x-2y)=(x^2-4y^2)^2÷（2y+x）2÷（x-2y)=[(x-2y)(x+2y)]^2÷（2y+x）2÷（x-2y)=(x-2y)^2(x+2y)^2÷（2y+x）2÷（x-2y)=[(x-2y)^2(x+2y)^2÷（2y+x）2]÷（x-2y)=[(x+2y)(x-2y)^2...