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