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МатематикаВопрос:
13) 12 ⋅ (7 - 2a) =
Ответ:
Используем распределительное свойство умножения: a ⋅ (b - c) = a ⋅ b - a ⋅ c
12 ⋅ (7 - 2a) = 12 ⋅ 7 - 12 ⋅ 2a = 84 - 24a
Ответ: 84 - 24a
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- 4) (c - 3) ⋅ 7 =
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