6x^2-12xy+6y^2/3x-3y

(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) x^2-xy-6y^2+3xy+y+2 已知xy=-2,x-y=3,求（x+y)（x-y)-y^2+（x-y)^2-（6x^2y-2xy^2)÷2y 化简分式方程:x*x-xy-y*y/x*x-3x-6y+2xy x^8-x^7y+x^6y^2-x^5y^3+x^4y^4-x^3y^5+x^2y^-xy^7+y^8 已知xy/x+y=6,求3x-2xy+3y/-x+3xy-y的值. 已知xy=-2,x-y=3,求(x+y)(x-y)-y²+(x-y)²-(6x²y-2xy 已知:x/y=-2,求x^2-2xy-3y^2/x^-6xy x^+2xy+y^+4=16 x^-2xy+y^=16 求(3xy+6y^)+|x^-(2xy+2y^-3x^)|的值 因式分解 求过程 x-xy+3y-3x 2x+xy-y-4x+5y-6