Ответ:
Объяснение:
(x - y)(x + y) + 2(x + 2y) - 3=x²-y²+2x+4y+1-4=(x²+2x+1)-(y²-4y+4)=
(x+1)²-(y-2)²=(x+1-y+2)(x+1+y-2)=(x-y+3)(x+y-1)
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Ответ:
Объяснение:
(x - y)(x + y) + 2(x + 2y) - 3=x²-y²+2x+4y+1-4=(x²+2x+1)-(y²-4y+4)=
(x+1)²-(y-2)²=(x+1-y+2)(x+1+y-2)=(x-y+3)(x+y-1)