Завдання:
Розкрий дужки:
1) 7(a – 1);
2) 4(b + 2);
3) –3(p – 2);
4) (2a – 1) ⋅ (–3);
5) (–8p + 3) ⋅ 5;
6) (–a – 2) ⋅ (–3).
Розв'язок:
1) 7(a – 1) = 7a – 7
2) 4(b + 2) = 4b + 8
3) -3(p – 2) = -3p + 6
4) (2a – 1) ⋅ (-3) = -6a + 3
5) (-8p + 3) ⋅ 5 = -40p + 15
6) (-a – 2) ⋅ (-3) = 3a + 6