分解因式:(y-x)²-2x-2y错了,是(y-x)²+2x-2y~
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分解因式:(y-x)²-2x-2y错了,是(y-x)²+2x-2y~
分解因式:(y-x)²-2x-2y
错了,是(y-x)²+2x-2y~
分解因式:(y-x)²-2x-2y错了,是(y-x)²+2x-2y~
(y-x)²+2x-2y=(x-y)²+2(x-y)=(x-y)(x-y+2)
(y-x)²+2x-2y
=(y-x)²-2(y-x)
=(y-x)(y-x-2)
(x-1)²+(y-1)²-2(xy+1)
(y-x)(y-x-2)
(x+y)(y-x-2)