x^2+2xy+y^2-1因式分解!

(x-y)^2-(xy+1)因式分解 y^3+xy^2+2xy+x^2-1 因式分解 因式分解xy²-2xy+x+2y-1 因式分解：x方y+2xy+y 因式分解 x(x-1)+y(y+1)-2xy 因式分解:X(X-1)+Y(Y+1)-2XY （x+y）(x-1)-xy-y^2 怎么因式分解? 因式分解 x方+y方-xy+2x-y+1 (xy-1)^2+(x+y-z)(x+y-zxy)因式分解 xy(xy+1)+xy+3-2(x+y+1/2)-(x+y-1)^2因式分解 因式分解（x+y)(x+y+2xy)+(xy+1)(xy-1) X^2（X+1）-Y（XY+X）因式分解 因式分解x^2y^2+x^2y+xy^2+3xy+x+y+1 x^2-y^2-1+2y因式分解,-x^2-y^2+1-2xy因式分解 2x^2-xy-y^2因式分解 因式分解x^2+xy-2y^2 X^2Y-2XY^2 因式分解 因式分解:-x^2+2xy-y^2