化简:(x+ y)(x-y) +(x+ y) +(x-y)

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化简:(x+y)(x-y)+(x+y)+(x-y)化简:(x+y)(x-y)+(x+y)+(x-y)化简:(x+y)(x-y)+(x+y)+(x-y)(x+y)(x-y)+(x+y)+(x-y)=(x

化简:(x+ y)(x-y) +(x+ y) +(x-y)
化简:(x+ y)(x-y) +(x+ y) +(x-y)

化简:(x+ y)(x-y) +(x+ y) +(x-y)
(x+ y)(x-y) +(x+ y) +(x-y)
=(x+ y)(x-y) +2x

X^2-Y^2+2X

（x+y）[(x-y)+(x-y)]

x*x-y*y+2x。

原式=x2-y2+x+y+x-y=x2+2x-y2

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

(x+ y)(x-y) +(x+ y) +(x-y)
=(x+ y)(x-y) +2x