(x²+4xy+4y²分之x²y-4y³)×(x-2y分之4xy+x)

问题描述:

(x²+4xy+4y²分之x²y-4y³)×(x-2y分之4xy+x)

原式=Y(X+2Y)(X-2Y)/(X+2Y)^2*X(X+2Y)/(X-2Y)
=XY.