因式分解(1) 3x²+6xy(2)x³y-2x²y²+xy³

问题描述:

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