Завдання:
Спрости вираз та випиши окремо його коефіцієнт:
1) –4 ⋅ p ⋅ 9;
2) –0,2a ⋅ (–5b);
3) 3,9a ⋅ (–2b);
4) 3,9 ⋅ a ⋅ 1,2 ⋅ b ⋅ (–10);
5) 7,9 ⋅ (–1) ⋅ a ⋅ 2b;
6) –5x ⋅ (–6y) ⋅ (–0,1t).
Розв'язок:
1) -4 ⋅ р ⋅ 9 = -4 ⋅ 9 ⋅ р = -36р; коефіцієнт -36
2) -0,2а ⋅ (-5b) = -0,2 ⋅ (-5) ⋅ ab = ab; коефіцієнт 1
3) 3,9a ⋅ (-2b) = 3,9 ⋅ (-2) ⋅ a ⋅ b = -7,8ab; коефіцієнт -7,8
4) 3,9 ⋅ a ⋅ 1,2 ⋅ b ⋅ (-10) = 3,9 ⋅ 1,2 ⋅ (-10) ⋅ a ⋅ b = -46,8ab; коефіцієнт -46,8
5) 7,9 ⋅ (-1) ⋅ а ⋅ 2b = 7,9 ⋅ 2 ⋅ (-1) ⋅ ab = -15,8ab; коефіцієнт -15,8
6) -5x ⋅ (-6y) ⋅ (-0,1t) = -5 ⋅ (-6) ⋅ (-0,1)xyt = -3xyt; коефіцієнт -3