(xy-x²)·x²分之x-y

来源:学生作业学帮网 编辑:学帮网 时间:2024/05/14 19:44:56

(xy-x²)·x²分之x-y

(xy-x²)·x²分之x-y
=(x-y)/x^2*x(y-x)
=-1/x^3

(x-y)/x(y-x)*x²=-1/x^3