化简一道式子1- 1/x+1 x- 2/X²-1

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化简一道式子1- 1/x+1 x- 2/X²-1
化简一道式子
1- 1/x+1 x- 2/X²-1

化简一道式子1- 1/x+1 x- 2/X²-1
1)1-X/(X+1)-2/(X²-1)
=(X²-1)/(X²-1)-X(X-1)/(X²-1)-2/(X²-1)
=(X-3)/(X²-1)
2)1-1/X(X+1)-2/(X²-1)
=X(X²-1)/X(X²-1)-(X-1)/X(X²-1)-2/(X²-1)
=(X³-2X-2)/(X²-1)