x2+x+y2-y-2xy=?

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x2+x+y2-y-2xy=?x2+x+y2-y-2xy=?x2+x+y2-y-2xy=?x^2+x+y^2-y-2xy=x^2-2xy+y^2+x-y=(x-y)^2+(x-y)=(x-y)(x-y

x2+x+y2-y-2xy=?
x2+x+y2-y-2xy=?

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

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

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

(X-Y)(X-Y+1)

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