4X＾2-12XY+9Y＾2-2X+3Y-6

(x-2xy)*(-xy+2y*y)-(3x*x-2xy)(x-9xy+6y*y) 化简：x-y/x+3y÷x^-y^2/x^2+6xy+9y^2-(xy/x+y) x*-2xy+3y*=9 4x*-5xy+6y*=30 化简.x＾2-3xy／x＾2－6xy+9y＾2 1、(-7x^y)(2x^y-3xy^3+xy) 2、((x-y)^6)/((y-x)^3)/(x-y) x^8-x^7y+x^6y^2-x^5y^3+x^4y^4-x^3y^5+x^2y^-xy^7+y^8 xy=-2,x+y=3,求代数式（4xy+12y)+[7x-(3xy+4y-x)] x^+2xy+y^+4=16 x^-2xy+y^=16 求(3xy+6y^)+|x^-(2xy+2y^-3x^)|的值 分解因式4x^2-12xy+9y^2-2x+3y-6 x^2-xy-6y^2+3xy+y+2 已知x＾2y等于3,求2xy(x^5y^2-3x^3y-4x) 因式分解 求过程 x-xy+3y-3x 2x+xy-y-4x+5y-6