怎么因式分解6(x-y)-9-(x-y)∧2

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怎么因式分解6(x-y)-9-(x-y)∧2怎么因式分解6(x-y)-9-(x-y)∧2怎么因式分解6(x-y)-9-(x-y)∧2原式=-[(x-y)^2-6(x-y)+9]=-(x-y-3)^2.

怎么因式分解6(x-y)-9-(x-y)∧2
怎么因式分解6(x-y)-9-(x-y)∧2

怎么因式分解6(x-y)-9-(x-y)∧2
原式=-[(x-y)^2-6(x-y)+9]=-(x-y-3)^2.

6x-9y-9-x-y*2