分解因式：x-y-xx+2xy-yy+2

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分解因式：x-y-xx+2xy-yy+2
分解因式：x-y-xx+2xy-yy+2

分解因式：x-y-xx+2xy-yy+2
x-y-xx+2xy-yy+2
=-(x-y)^2+(x-y)+2
=(-x+y+2)(x-y+1)

x-y-xx+2xy-yy+2
=x-y-(x²-2xy+y²)+2
=-(x-y)²+(x-y)+2
=[(x-y)²-(x-y)-2]
=-(x-y-2)(x-y+1)

x-y-x²+2xy-y²+2
=(x-y)-(x²-2xy+y²)+2
=(x-y)-(x-y)²+2
=(-x+y-1)(x-y-2)
=(y-x-1)(x-y-2)

jjj

(x-y)（1-x+y)+2

原式= -（X²-2XY+Y²）-（Y-X）+2
= -[(Y-X)²+(Y-X)-2]
= -(Y-X+2)(Y-X-1)

分解因式：x-y-xx+2xy-yy+2 help me:分解因式：x-y-xx+2xy-yy+2=0 已知2x=3y,求xy/xx+yy-yy/xx-yy的值因式分解：xx-2x-2yy+4y-xy xx-2xy+yy+4x-4y+4 xx+4xy+yy-2x-4y+6 因式分解 2xy-xx-yy x^2-xy+y^2 分解因式分解因式：-x-2xy-y² 已知x(x-1)-(xx-y)=-3求xx+yy-2xy 已知x（x+1)-(xx+y)=3,求(xx+yy)/2-xy的值 x(x+1)-(xx+y)=-3,求(xx+yy)/2-xy的值 x-y/x+y=2,则xx+2xy+yy/4xy=? 分解因式：7xx-3y+xy-21x 若xx+yy-2x-6y+10=0,求分式（xx-yy）/xy的值. xy(x-y)-x(y-x)^2分解因式 (x^2-xy)^2-(xy-y^2)^2分解因式 x+3xy+3xy+2y分解因式