Question

Нужна помощь, 25 балов) сделать всё!

Answer 1

Ответ:

Объяснение:

a) 3b + (5a - 7b) = 3b + 5a - 7b = b(3 - 7) + 5a = 5a - 4b

б) -3q - (8p - 3q) = -3q - 8p + 3q = q(-3 + 3) - 8p = 0q - 8p = -8p

в) (2 + 3a) + (7a - 2) = 2 + 3a + 7a - 2 = a(3 + 7) + 1(2-2) = 10a + 0 = 10a

г) -(11a + b) - (12a - 3b) = -11a - b - 12a + 3b = a(-11-12) + b(-1 + 3) = 2b - 23a

д) a + (a - 10) - (12 + a) = a + a - 10 - 12 - a = a( 1 + 1 - 1) + 1(-10 - 12) = a - 22

е) (6x - 8) - 5x - (4 - 9x) = 6x - 8 - 5x - 4 + 9x = x(6 - 5 + 9) + 1(-8 -4) = 10x - 12

Answer 2

1)

$3b + (5a - 7b) = \\ = 3b + 5a - 7b = \\ = 5a - 4b$

2)

$- 3q - (8p - 3q) = \\ = - 3q - 8p + 3q = \\ = - 8p$

3)

$(2 + 3a) + (7a - 2) = \\ = 2 + 3a + 7a - 2 = \\ = 10a$

4)

$- (11a + b) - (12a - 3b) = \\ = - 11a - b - 12a + 3b = \\ = 2b - 23a$

5)

$a + (a - 10) - (12 + a) = \\ = a + a - 10 - 12 - a = \\ = a - 22$

6)

$(6x - 8) - 5x - (4 - 9x) = \\ = 6x - 8 - 5x - 4 + 9x = \\ = 10x - 12$