因式分解(1) 3x²+6xy(2)x³y-2x²y²+xy³
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因式分解(1) 3x²+6xy(2)x³y-2x²y²+xy³
因式分解(1) 3x²+6xy(2)x³y-2x²y²+xy³
因式分解(1) 3x²+6xy(2)x³y-2x²y²+xy³
(1) 3x²+6xy
=3x(x+2y)
(2)x³y-2x²y²+xy³
=xy(x²-2xy+y²)
=xy(x-y)²