Question

一道初二算术题,X^3*Y^3-2X^2Y^2+XY=?一定要把过程写出来,有必要的话还可以吧分析写出来.注：X^2代表

Answer 1

=(xy)^3-2(xy)^2+xy

=xy[(xy)^2-2xy+1]

=xy(xy-1)^2