y^2-2y+1分之xy-x-y+1(化简)
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y^2-2y+1分之xy-x-y+1(化简)
y^2-2y+1分之xy-x-y+1(化简)
y^2-2y+1分之xy-x-y+1(化简)
原式=
[x(y-1)-(y-1)]/(y-1)^2
=(x-1)(y-1)/(y-1)^2
=(x-1)/(y-1)
=(x-1)(y-1) 除以(y-1)^2=(x-1)/(y-1)
=(x-1)(y-1)/(y-1)^2=(x-1)/(y-1)
y平方-2y+1分之xy-x-y-1
Y的平方+2Y+1分之xy+x
数学化简(y的平方-2y+1)分之(xy-x-y+1)
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(x+2y-3xy+2x+y-xy)-(-2-y+xy),其中x+y=2分之1,xy=-2分之1
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