计算下面式子{x-y+[(4xy)/(x-y)]}{x-y-[(4xy)/(x-y)]}

计算下面式子{x-y+[(4xy)/(x-y)]}{x-y-[(4xy)/(x-y)]} 化简计算:[x-y+4xy/(x-y)] * [x+y-4xy/(x+y)] 计算:[x-y+4xy/(x-y)] * [x+y-4xy/(x+y)] 计算：（x-y+4xy/x-y)(x+y-4xy/x+y) (x-y+(4xy/x-y))(x+y-(4xy/x+y)) 分式计算 计算：(xy-x²)×x-y/xy 这个式子怎么因式分解3x²+4xy+y 计算:2xy/(x+y)².(x+y)/4y 计算(3x-4y)-(3x+4y)-xy 计算：[(x-y)^2-(x+y)^2]/(-4xy)= （x^2+xy/x-y)/（xy/x-y)计算 计算:4xy-(x+y)^2/xy(x+y)(x-y)÷x^2+xy-2y^2/x^2y+2xy^2 {[(x根号x)+(x根号y)]/(xy-y2)}-[x+(根号xy)+y]/[(x根号x)-(y根号y)] y2是指y的平方；求上述式子的值.{[(x根号x)+(x根号y)]/(xy-y2)}-[x+(根号xy)+y]/[(x根号x)-(y根号y)] 化简或计算。 计算x²y³-2x(4xy³) 计算(-xy)(x+2x²y) {x-y+(4xy/x-y)}{x+y-(4xy/x+y)}怎么解?/是分数线,第一个式子中分子是4xy,分母是x-y；第二式中分子是4xy,分母是x+y. 若x+y=5,xy=4,则式子2分之xy-2x-2y的值是多少? 若x+y=5,xy=4,则式子2分之xy-2x-2y的值是