(1-x²)(1-y²)-4xy 因式分解

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(1-x²)(1-y²)-4xy 因式分解
(1-x²)(1-y²)-4xy
（2x²-3x+1）²-22x+33x-1

(1-x²)(1-y²)-4xy
=1-x²-y²+x²y²-2xy-2xy
=1-2xy+x²y²-x²-y²-2xy
=(1-xy)²-(x+y)²
=(1-xy+x+y)(1-xy-x-y)
(2x²-3x+1)²-22x+33x-1
题目有误
再问：第二道没错

因式分解xy²-2xy+x+2y-1 x²-xy+1/4y²-1因式分解因式分解：x²-y²+4xy xy+x+y+1因式分解 1-x-y+xy 因式分解因式分解xy-x-y+1 xy-x-y+1因式分解多项式因式分解 1,(x-y)³-(x-y)²(x+y) 2,x(x²-xy)-(4x&# x²+y²-x²y²-4xy-1因式分解 1-2xy-x²-y² 因式分解因式分解：（x+y)³+2xy-2x²y-2xy²-1 因式分解:4x²y+4xy²+xy²