x^2-7xy+6y^2
1、(-7x^y)(2x^y-3xy^3+xy) 2、((x-y)^6)/((y-x)^3)/(x-y)
x^2-7xy+6y 因式分解
(x-2xy)*(-xy+2y*y)-(3x*x-2xy)(x-9xy+6y*y)
x^2-xy-6y^2+3xy+y+2
已知X+y=6,xy=7 求x^2y+xy^2=
x+y=8,xy=-2,求(5xy+4x+7y)+(6x-3xy)-(4xy-3y)的值
(xy-x^2)乘以(xy)/(x-y)
x^2y-7xy+6y (因式分解)
x^3y(-4y)^2+(-7xy)^2*(-xy)-5xy^3*(-3x)^2
化简:x-y/x+3y÷x^-y^2/x^2+6xy+9y^2-(xy/x+y)
因式分解:8(x-2y)-x(7x+y)+xy.
已知xy^2=-6,求-xy(x^3y^7-3x^2y^5-y)的值