(аb)^3-b^3+(ab)^2-b^2=(ab)^2(ab+1)-b^2(b+1)=(ab+1)(b+1)((ab)^2-b^2)
Вложение ...................................................
Ответ смотри в вложении ниже
(8 × 10^2)^2 × (3 × 10^2) = (8 × 10 × 10) × (8 × 10 × 10) × (3 × 10 × 10) = 192000000
1) 8 × 10 = 80
2) 80 × 10 = 800
3) 8 × 10 = 80
4) 80 × 10 = 800
5) 3 × 10 = 30
6) 30 × 10 = 300
7) 800 × 800 = 640000
8) 640000 × 300 = 192000000