Ответ:
Объяснение:
x²-y²+x+y=(x²-y²)+(x+y)=(x-y)(x+y)+x+y)= (x+y)(x-y+1)
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Ответ:
Объяснение:
x²-y²+x+y=(x²-y²)+(x+y)=(x-y)(x+y)+x+y)= (x+y)(x-y+1)