化简:x^2-2xy+y^2-1 除以 x-y-1

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化简:x^2-2xy+y^2-1除以x-y-1化简:x^2-2xy+y^2-1除以x-y-1化简:x^2-2xy+y^2-1除以x-y-1:x^2-2xy+y^2-1除以x-y-1=(x-y)&sup

化简:x^2-2xy+y^2-1 除以 x-y-1
化简:x^2-2xy+y^2-1 除以 x-y-1

化简:x^2-2xy+y^2-1 除以 x-y-1
:x^2-2xy+y^2-1 除以 x-y-1
=(x-y)²-1除以x-y-1
=(x-y+1)(x-y-1)除以x-y-1
=x-y+1

=[(x-y)^2-1]/(x-y-1)=(x-y+1)(x-y-1)/(x-y-1)=x-y+1

(x²-2xy+y²-1)/(x-y-1)
=(x-y)²-1)/(x-y-1)
=(x-y-1)(x-y+1)/(x-y-1)
=(x-y+1)

(x/y)^2乘以(xy)^-2除以(x^-1y) (XY-X^2)除以X-Y/XY=? (xy-x^2)除以xy分之x-y （y/(x^2-xy)+x/(y^2-xy))除以(x-y)/(xy) 化简:x^2-2xy+y^2-1 除以 x-y-1 x-y/x^2+xy除以xy-x^2/x^2y^2-x^4*1/x-y 化简(x的平方-4xy+4y的平方-1)除以(x-2y-1) (x平方y-2/3xy平方+xy)除以(1/3xy) 化简:(x-y)除以(根号x+根号y)-(x-2根号xy+y)除以(根号x-根号y) 化简：（1/(x-y)—1/(x+y)）除以2y/(x^2-2xy+y^2) 代数 x^-y^/ x^-(y-z)^ 除以 x^+2xy+y^/(x-y)^-z^ 乘 x^+xy-xz/x^-xy [(x+y)^2-(x-y)^2]除以2xy [(x+y)^2-(x-y)^2 ]除以2xy xy分之x^2-y^2除以(x-y) [-xy^2(2x+y)-8xy)-x^2y)]除以2xy=计算 [(xy-2)(-xy-2)-4(xy-1)^2]除以(-xy),其中x=20,y=-25分之1 若(2x-14xy-2y)除以(x-2xy-y)=4,则1/x-1/y= 【2x（x平方y-xy平方）+xy（xy（xy-x平方）】除以x平方y