因式分解①9(x+y)²-12(x+y-1/3) ②8-6x-6y+（x+y）²③xy³-2x²y²+x³y
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因式分解①9(x+y)²-12(x+y-1/3)②8-6x-6y+（x+y）²③xy³-2x²y²+x³y因式分解①9(x+y)²
因式分解①9(x+y)²-12(x+y-1/3) ②8-6x-6y+（x+y）²③xy³-2x²y²+x³y
因式分解①9(x+y)²-12(x+y-1/3) ②8-6x-6y+（x+y）²③xy³-2x²y²+x³y
因式分解①9(x+y)²-12(x+y-1/3) ②8-6x-6y+（x+y）²③xy³-2x²y²+x³y
1、(3x+3y-2)^2
2、(x+y-2)(x+y-4)
3、xy(x-y)^2