Question

1. Розкрий дужки та зведи подiбнi додонки.

a) 3(4a + b) — 2(3a - 2b) =

6) -7(-4x + 3) + 2(3x - 7) =

B) 4,5(-8y - 7) - 3,9(6 - 9y) =

Answer 1

a) 3(4a + b) — 2(3a - 2b) =
= 12a + 3b - 6a + 4b = 12a + 7b

6) -7(-4x + 3) + 2(3x - 7) =
= 28x - 21 + 6x - 14 = 34x - 35

B) 4,5(-8y - 7) - 3,9(6 - 9y) =
= -36y - 31,5 - 23,4 + 35,1y = -0,9y -54,9