x³-x²/x²+x÷(x²-1) 计算

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x³-x²/x²+x÷(x²-1) 计算

原式=x²(x-1)/x(x+1)÷(x+1)(x-1)
=x(x-1)/(x+1)÷(x+1)(x-1)
=x/(x+1)²

=x²(x-1)/x(x+1)×1/(x+1)(x-1)
=x/(x+1)²