(x-x²-1/1-x)·x²-2x+1/x²-x+1求值.(x-x²-1/1-x)·x²-2x+1/x²-x+1

(x-x²-1/1-x)·x²-2x+1/x²-x+1求值.(x-x²-1/1-x)·x²-2x+1/x²-x+1(x-x²-1/

(x-x²-1/1-x)·x²-2x+1/x²-x+1求值.(x-x²-1/1-x)·x²-2x+1/x²-x+1
(x-x²-1/1-x)·x²-2x+1/x²-x+1
求值.(x-x²-1/1-x)·x²-2x+1/x²-x+1

(x-x²-1/1-x)·x²-2x+1/x²-x+1求值.(x-x²-1/1-x)·x²-2x+1/x²-x+1
(x-x²-1/1-x)·x²-2x+1/x²-x+1
=(x-x²-1/x²-x+1)·x²-2x+1/(1-x)
=-1*(1-x)
=x-1

答案是x-1

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