4y/3x·x/2y^3= ab^2/2c^2÷-3a^2b^2/4cd

题目

4y/3x·x/2y^3= ab^2/2c^2÷-3a^2b^2/4cd
(x^2-4y^2)/(x^2-2xy+y^2)除以x-2y/x²-xy 求求啊、、

答案

=(X+2Y)(X-2Y)/(X-Y)^2乘以X(X-Y)/X-2Y
=X(X+2Y)/X-Y