因式分解:x^3(a+1)-xy(x-y)(a-b)+y^3(b+1)急.................急,,,急

因式分解xy-x-y+1 xy+x+y+1因式分解 1-x-y+xy 因式分解 因式分解:xy+x+y+1 xy-1+x-y因式分解 xy-x-y+1因式分解 x^3(a+1)-xy(x-y)(a-b)+y^3(b+1)因式分解 y^3+xy^2+2xy+x^2-1 因式分解 因式分解 x2(x+1)-y(xy+x) 因式分解x^2y^2+x^2y+xy^2+3xy+x+y+1 xy(xy+1)+xy+3-2(x+y+1/2)-(x+y-1)^2因式分解 x^3(a+1)-xy(x-y)(a-b)+y3^(b+1) 因式分解 x^3(a+1)-xy(x-y)(a-b)+y3^(b+1) 因式分解 2x²-xy+3x-y+1因式分解 因式分解（x+y-2xy)(x+y-2)+(xy-1)^2设x+y=a,xy=b, -xy^2(x+y)^3+x(x+y)^2因式分解 因式分解 3X^+6XY+3Y^ 因式分解 -x^3y+xy^3