(x²-4x+4)/(x²-2x)÷(x-4/x）=(x-2)²/[x(x-2)]÷[(x²-4)/x]=[(x-2)/x]×{x/[(x-2)(x+2)]}=1/(x+2）不等式组｛x+4＞0，｛2x+5＜1==>{x>-4,x<-2==>-4∵x是整数∴x=-3∴原式=1/(-3+2)=-1
