计算 (2/x)的3次方 (-4x/3y)平方 (ab-b平方)/a-b/ab

问题描述:

计算 (2/x)的3次方 (-4x/3y)平方 (ab-b平方)/a-b/ab
xy平方-x的3次方/x平方+2xy+y平方/(x/x-y)*x+y/x平方-2xy+y平方

(2/x)的3次方=8/x^3(-4x/3y)平方=16x^2/9y^2(ab-b平方)/a-b/ab=b(a-b)/(a-b)/ab=b(a-b)*ab/(a-b)=ab^2xy平方-x的3次方/x平方+2xy+y平方/(x/x-y)*x+y/x平方-2xy+y平方=x(y^2-x^2)/(x+y)^2/(x/x-y)*(x+y)/(x...