y-x分之x²-2xy+y²= (分式)
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y-x分之x²-2xy+y²= (分式)
y-x分之x²-2xy+y²= (分式)
y-x分之x²-2xy+y²= (分式)
y-x分之x²-2xy+y²
=(y-x)²/(y-x)
=y-x
如追加其它问题,采纳本题后点击想我求助,
等于y-x
没错
y-x分之x²-2xy+y²=(x-y)^2/(y-x)=|y-x|
(x²-2xy+y²)/(y-x)
=(x-y)²/(y-x)
=-(x-y)²/(x-y)
=-(x-y)
=-x+y