x^3-4xy^2/3x^3+6x^2y
(x-2xy)*(-xy+2y*y)-(3x*x-2xy)(x-9xy+6y*y)
1、(-7x^y)(2x^y-3xy^3+xy) 2、((x-y)^6)/((y-x)^3)/(x-y)
化简:x-y/x+3y÷x^-y^2/x^2+6xy+9y^2-(xy/x+y)
(-3x^y+2xy)-( )=4x^+xy
因式分解 求过程 x-xy+3y-3x 2x+xy-y-4x+5y-6
x^+2xy+y^+4=16 x^-2xy+y^=16 求(3xy+6y^)+|x^-(2xy+2y^-3x^)|的值
x^8-x^7y+x^6y^2-x^5y^3+x^4y^4-x^3y^5+x^2y^-xy^7+y^8
[3xy(1-x)-6xy(x-1/2)]*2x*(-xy)平方,x=-1 y=2 ; 3xy平方(-1/3x平方y+4
-3(2x-xy)-4(-6+xy+x.其中x=1,y=-1
因式分解:3x^2y+6xy-4x-8
因式分解 3x^2-6xy-4x+8y
4x的平方-2x+6xy-3y