作业帮(-1/3xy)^2•[xy(2x-y)-2x(xy-y^2)]
来源：学生作业帮助网 编辑：作业帮 时间：2024/04/28 05:30:10
![(-1/3xy)^2•[xy(2x-y)-2x(xy-y^2)]](/uploads/image/z/2493867-3-7.jpg?t=%28-1%2F3xy%29%5E2%26%238226%3B%5Bxy%282x-y%29-2x%28xy-y%5E2%29%5D)
(-1/3xy)^2•[xy(2x-y)-2x(xy-y^2)]
(-1/3xy)^2•[xy(2x-y)-2x(xy-y^2)]
(-1/3xy)^2•[xy(2x-y)-2x(xy-y^2)]
(-1/3xy)^2*[xy(2x-y)-2x(xy-y^2)]
= (-1/3xy)^2*[xy(2x-y)-2xy(x-y)]
= (-1/3xy)^2*xy(2x-y-2x+2y)
= (1/9x^2y^2)*xy^2
=1/9x