a) 4 ⋅ (y + 5); б) 6 ⋅ (3b - 2); в) -2 ⋅ (x + 8); г) 0,2 ⋅ (10p - 15q).

Решение:

Используем распределительное свойство умножения: a ⋅ (b + c) = a ⋅ b + a ⋅ c.

• a) 4 ⋅ (y + 5) = 4 ⋅ y + 4 ⋅ 5 = 4y + 20
• б) 6 ⋅ (3b - 2) = 6 ⋅ 3b - 6 ⋅ 2 = 18b - 12
• в) -2 ⋅ (x + 8) = -2 ⋅ x + (-2) ⋅ 8 = -2x - 16
• г) 0,2 ⋅ (10p - 15q) = 0,2 ⋅ 10p - 0,2 ⋅ 15q = 2p - 3q