Question

Розкрийте дужки: 1) 4(5x + 9y–z); 2) (–2,6а–b + 1,4с)(–d) 3) 3(2а + b–8с); 4) (–m–3,4n + 3k)(–р)

Answer 1

Ответ:

$4(5x + 9y - z) = 20x + 36y - 4z \\ ( - 2.6a - b + 1.4c)( - d) = 2.6ad + db - 1.4cd \\ 3(2a + b - 8c) = 6a + 3b - 24c\\ ( - m - 3.4n + 3k)( - p) = mp - 3.4np - 3kp$

Answer 2

Пошаговое объяснение:

4(5х + 9у - z) = 20x + 36y - 4z

(-2,6а - b + 1,4с)(-d) = 2,6ad + bd - 1,4cd

3(2a + b - 8c) = 6a + 3b - 24c

(-m - 3,4n + 3k)(-p) = mp + 3,4np - 3kp

Answer 3

1. 4(5x + 9y - z) = 20x + 36y - 4z

2. (-2.6a - b + 1.4c)(-d) = 2.6ad + bd - 1.4cd

3. 3(2a + b - 8c) = 6a + 3b - 24c

4. (-m - 3.4n + 3k)(-p) = mp + 3.4np - 3kp