Ответ:
3y+9
Объяснение:
(y+3)(y-(y-3)) = (y+3)(y-y+3) = 3(y+3) = 3y=9
y(y+3)-(y+3)(y-3)=y2+3y-(y-9)2=y2+3y-y2-18y+81=-15y+81
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Ответ:
3y+9
Объяснение:
(y+3)(y-(y-3)) = (y+3)(y-y+3) = 3(y+3) = 3y=9
Ответ:
y(y+3)-(y+3)(y-3)=y2+3y-(y-9)2=y2+3y-y2-18y+81=-15y+81