分解因式：(x+y)²(x-y)+(x+y)(x-y)²

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分解因式：(x+y)²(x-y)+(x+y)(x-y)²
分解因式：(x+y)²(x-y)+(x+y)(x-y)²

分解因式：(x+y)²(x-y)+(x+y)(x-y)²
原式=(x+y)(x-y)[(x+y)+(x-y)]
=2x(x+y)(x-y)

=(x+y)(x-y)(x+y +x-y) = 2x(x+y)(x-y)

原式=2x(x+y)(x-y)