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

因式分解:12xy^2(y-x)+xy^3(x-y)+4x^2y(x-y) X×X-2XY-Y×Y+2X-2Y+2=02X×2X-4XY-2Y×2Y+3X-3Y+4=0X×X+2XY+Y×Y+X+Y-56=0X×X-2XY+Y×Y-X+Y-12=0X×X-3XY+Y×Y=-13X×3X-XY+3Y×3Y=13 两个在一起的方程之间有所联系（要求一步一步写出来） 3x^2-12x^2y+12xy^2 -3x^3+12x^2y-12xy^2 (2x+3y)^2-(3x^2+12xy) （12x^2y-8xy^2+16xy）/-3x+2y-4=? (12x^2y-8xy^2+16xy）/-3x+2y-4=? -12xy*3x^2y-x^2y*(-3xy) 已知x+y=3,xy=-12,x^2-xy+y^2 因式分解x^3+9xy^2-12x^2y x^3+x+30x^2-4xy+4y^2+7x-14y+12 （x*x-2xy）*9x*x-(9xy*y*y-12x*x*x*x*y*y)/3xy,其中x=1,y=-1 化简 帮个忙, 若x+y=4,x^3+y^3=(x+y)(x^2-xy+y^2)z,求x^3+12xy+y^3的值. 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! (-4x(2xy+3xy^2)+12(x^2y)^2y^3)÷（-6xy） (8y^2-12xy)/(2y-3x) 已知x-xy =21,xy-y=-12,分别求式子x-y与x-2xy +y