x=√2014+3,则x²=2014+6√2014+9=2023+6√2014
﹙1- 3/x﹚÷﹙x - 6x-9/x﹚
=﹙1- 3/x﹚÷﹙-5x-9/x﹚
=﹙3/x-1﹚÷﹙5x+9/x﹚
=[(3-x)/x]÷[(5x²+9)/x]
=[(3-x)/x][x/(5x²+9)]
=(3-x)/(5x²+9)
=[3-(√2014+3)]/[5(2023+6√2014)+9]
=[3-√2014-3]/[10115+30√2014+9]
=[-√2014]/[10124+30√2014]要先化简啊从第二行到第七行就是化简啊