(a - 1)(b + c).
Объяснение:
ab+ac-b-c = (ab - b) + (ac - c) = b(a - 1) + c(a - 1) = (a - 1)(b + c).
а×(b+c)-(b+c)
(b+c)×(a-1)
(a - 1)(b + c).
Объяснение:
ab+ac-b-c = (ab - b) + (ac - c) = b(a - 1) + c(a - 1) = (a - 1)(b + c).
а×(b+c)-(b+c)
(b+c)×(a-1)