2x^2+xy-6y^2
(x-2xy)*(-xy+2y*y)-(3x*x-2xy)(x-9xy+6y*y)
(xy-x^2)乘以(xy)/(x-y)
x^2-xy-6y^2+3xy+y+2
(x^2+xy/x-y)/(xy/x-y)计算
化简:x-y/x+3y÷x^-y^2/x^2+6xy+9y^2-(xy/x+y)
1、(-7x^y)(2x^y-3xy^3+xy) 2、((x-y)^6)/((y-x)^3)/(x-y)
(x+y-2xy)(x+y-2)+(1-xy)²
已知xy/x+y=6,求3x-2xy+3y/-x+3xy-y的值.
(x^2-xy)y÷y-x/xy怎么做?
6x^2y^2+xy-15
因式分解 2x^+xy-6y^
x^2-7xy+6y 因式分解