2x^2-4xy+2y^2-3(x-y+3) 因式分解

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2x^2-4xy+2y^2-3(x-y+3)因式分解2x^2-4xy+2y^2-3(x-y+3)因式分解2x^2-4xy+2y^2-3(x-y+3)因式分解2x^2-4xy+2y^2-3(x-y+3)

2x^2-4xy+2y^2-3(x-y+3) 因式分解
2x^2-4xy+2y^2-3(x-y+3) 因式分解

2x^2-4xy+2y^2-3(x-y+3) 因式分解
2x^2-4xy+2y^2-3(x-y+3)
=2(x²-2xy+y²)-3(x-y)-9
=2(x-y)²-3(x-y)-9
=[2(x-y)+3][(x-y)-3]