-4/9x^3+2x^2y-9/4xy^2分解因式急

因式分解:12xy^2(y-x)+xy^3(x-y)+4x^2y(x-y) 3x*x+5xy-2y*y+x+9y-4 3x*x+5xy-2y*y+x+9y-4请因式分解 因式分解3x2+xy-y2+x+9y-43X^2+XY-Y^2+X+9Y-4 已知X+Y=3,XY=-1,求2(X-Y)^4-9(X-Y)^2+12XY 化简:-x(2)-(2xy) *9x(2)-9xy(3)+12x(4)y(2)/(3xy)谢谢! (x-2xy)*(-xy+2y*y)-(3x*x-2xy)(x-9xy+6y*y)答案应为-2x-x*x-3x， 9-x^2-y^2+4xy 9-x^2-y^2+4xy, 已知2x+xy=10,3y+2xy=6.求4x+8xy+9y=? 已知2x-3根号xy-2y=0(x>0),求x^2+4xy-16y^2/x^2+xy-9y^2 因式分解 x-xy+3y-3x 2x+xy-y-4x+5y-6 化简：3x^2-[5xy-(x^y-3xy)+4x^2y-8xy] （-3x^y+2xy)-( )=4x^+xy 因式分解：4a^2(x-y)+9(y-x) -4x^2y^2+x^3y+4xy^3 因式分解：4a^2(x-y)+9(y-x) -4x^2y^2+x^3y+4xy^3 4x-y/2根号x+根号y 9x-6根号xy+y/3根号x-根号y [(-3xy)^2*x^3-2x^2*(3xy^2)^3*2/1y]/9x^4*y^2