Пошаговое объяснение:
10d (10d + 10) - (10d – 10) (10 + 10d) =
= (10d + 10)( 10d - 10d + 10) = 10 (d + 1) * 10 = 100(d +1) =
= 100 (10.8 + 1) = 11.8 *100 = 1180
Пошаговое объяснение:
10d (10d + 10) - (10d – 10) (10 + 10d) =
= (10d + 10)( 10d - 10d + 10) = 10 (d + 1) * 10 = 100(d +1) =
= 100 (10.8 + 1) = 11.8 *100 = 1180