(x-y)²-(3x-3xy+y²)因式分解
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(x-y)²-(3x-3xy+y²)因式分解(x-y)²-(3x-3xy+y²)因式分解(x-y)²-(3x-3xy+y²)因式分解(x-y
(x-y)²-(3x-3xy+y²)因式分解
(x-y)²-(3x-3xy+y²)因式分解
(x-y)²-(3x-3xy+y²)因式分解
(x-y)²-(3x-3xy+y²)
=x²+y²-2xy-3x+3xy-y²
=x²-3x+xy
=x(x+y-3)
原式=(x-y+3x-3xy+y²)(x-y-3x+3xy-y²)
=(4x-y-3xy+y²)(3xy-2x-y-y²)