4(x+y)^2-12(x+y)(x-y)+9(+y)^2因式分解,

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4(x+y)^2-12(x+y)(x-y)+9(+y)^2因式分解,

4(x+y)^2-12(x+y)(x-y)+9(+y)^2因式分解,
4(x+y)^2-12(x+y)(x-y)+9(+y)^2因式分解,

4(x+y)^2-12(x+y)(x-y)+9(+y)^2因式分解,