解:原式=[(x-1)/x-(x-2)/(x+1)]÷[(2x²-x)/(x²+2x+1)]={(x-1)(x+1)/[x(x+1)]-x(x-2)/[x(x+1)]}÷[x(2x-1)/(x+1)²]={(x²-1-x²+2x)/[x(x+1)]}×{(x+1)²/[x(2x-1)]}={(2x-1)/[x(x+1)]}×{(x+1)²/[x(2x-1)]}=(x+1)/x²∵x²-x-1=0∴x²=x+1∴原式=x²/x²=1
先化简,再整体代入即可。上面的解法是正确的