[(x-y)^2]*[x/(x^2-y^2)]-[(2xy^2)/(x^2+xy)]
(xy-x^2)乘以(xy)/(x-y)
(x^2+xy/x-y)/(xy/x-y)计算
(x+y-2xy)(x+y-2)+(1-xy)²
(x^2-xy)y÷y-x/xy怎么做?
(x-2xy)*(-xy+2y*y)-(3x*x-2xy)(x-9xy+6y*y)
x-y/x²÷x²-2xy+y²/xy*(xy-x²)
因式分解:x×x-xy-2y×y-x-y
作乘法:(x+y)(x^2-xy+y^2);(x-y)(x^2+xy+y^2)
x根号x+x根号y/xy-y^2)-(x+根号xy+y/x根号x-y根号)y
(x^-4y^)/(x^+2xy+y^)/(x+2y)/(2x^+2xy)
计算:(x+y/x-y)÷(xy+x^2)
因式分解:8(x-2y)-x(7x+y)+xy.