Ответ:
Объяснение:
1)(a-5)(a2+5a+25)-(a-1)(a2+a+1)=(a3-5^3)-(a3-1)-a3-125-a3+1=-124
2)(y-3)(y2+3y+9)-y(y-3)(y+3)-(y-3)2=y3-3^3-y(y2-9)-(y2+6y+9)=y3-27-y3+9y-y2-6y-9=3y-y2-36
3)(a-b)(a+b)(a4+a2b2+b4)=(a2-b2)(a4+a2b2+b4)=(a2)3-(b2)3=a6-b6
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Ответ:
Объяснение:
1)(a-5)(a2+5a+25)-(a-1)(a2+a+1)=(a3-5^3)-(a3-1)-a3-125-a3+1=-124
2)(y-3)(y2+3y+9)-y(y-3)(y+3)-(y-3)2=y3-3^3-y(y2-9)-(y2+6y+9)=y3-27-y3+9y-y2-6y-9=3y-y2-36
3)(a-b)(a+b)(a4+a2b2+b4)=(a2-b2)(a4+a2b2+b4)=(a2)3-(b2)3=a6-b6