数学问题计算(X
计算(X-y+4xy/x-y)(x+y-4xy/x+y)的值?谢谢!!!
(X-y+4xy/x-y)(x+y-4xy/x+y) =[（X-Y）^+4XY/（X-Y）,（X+Y）^-4XY/（X+Y）] =[（X+Y）^/（X-Y）,（X-Y）^/（X+Y）] =（X+Y）（X-Y） =X^-Y^