分解因式：(x+y)^+4(x-y)^-4(x^-y^)
问题描述：
分解因式：(x+y)^+4(x-y)^-4(x^-y^)
答
(x+y)^+4(x-y)^-4(x^-y^)
=(x+y)²-4(x+y)(x-y)+4(x-y)²
=(x+y-2x+2y)²
=(3y-x)²