4xy^2-4x^2y-y^3 和 -a+2a^2-a^3 公因式

因式分解:12xy^2(y-x)+xy^3(x-y)+4x^2y(x-y) 因式分解 x-xy+3y-3x 2x+xy-y-4x+5y-6 A与2x²y-5xy²+6y³的和为3x²-4x²y+5y²,求A 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 化简：3x^2-[5xy-(x^y-3xy)+4x^2y-8xy] 化简2(x²y+xy)-3(x²y-xy)-4x²y 4xy^2-4x^2y-y^3 和 -a+2a^2-a^3 公因式 xy-2{xy-[3x^2y-(4xy^2+0.5xy)]+4x^2y}+6xy^2 x^3y(-4y)^2+(-7xy)^2*(-xy)-5xy^3*(-3x)^2 5x^3y*(-3y)^2+(-6xy)^2*(-xy)+xy^3*(-4x^2) （X-3xy+4xy-y）-[-2x-2（xy-3/2xy）-y]+6xy的过程 3(x^2y+xy)-4(xy-2x^2y)-(-xy) 当x-y=2xy时,求4x-3xy-4y/xy XY(XY+3)+(XY+4)+4(X+Y+1)-(X+Y+2) （-3x^y+2xy)-( )=4x^+xy 3（x平方y+xy)-4(xy-2x平方y)-(xy) 下列因式分解中,正确的是：.A.-2x^3-3xy^3+xy=-xy(2x^2-2y^2+1).B.-x^2-y^2=-(x+y)(x-y)C.16x^2+4y^2-16xy=4(2x-y)D.x^2)y+2xy+4y=y(x+2)^2