计算:(5-xy/x^3-x^2y)/(1-5/xy)^2*(y-x)^3
计算:(5-xy/x^3-x^2y)/(1-5/xy)^2*(y-x)^3
计算3xy[2xy-x(y-2)+x-1]
计算:3xy[2xy-x(y-2)+x]
已知xy/x+y=1/2,则代数式3x-5xy+3y/-x+3xy-y=
(3x-y)^2+(2x+3y)(-2x-3y)+5xy 计算
5x^2y/-1/2xy*3xy^2
计算(x^8-x^7y+x^5y^3-x^4y^4+x^3y^5-x^y^7+y^8)(x^2+xy+y^2)
计算3x[xy-2x(1/y-x/3]+3y(x²-y²)
x^3y(-4y)^2+(-7xy)^2*(-xy)-5xy^3*(-3x)^2
(x^2+xy/x-y)/(xy/x-y)计算
是关于因式分解的``1.计算x×x×x×x+5×x×x-6(x+y)(x+y+2xy)+(xy+1)(xy-1)2.已知
计算(3x^3y-x^2y+1/2xy)÷(-1/2xy)