Question

Раскройте скобки:1. -2(a-3b+6) 2. (a-5b)×(-4)3. (3a-2b-5)×4 4) -(-7x-7+1)​

Answer 1

Ответ:

1. -2a+6b-12

2. -4a+20b

3. 12a-8b-20

4. 7x+7-1

Пошаговое объяснение:

1. -2*a-2*(-3b)-2*6

2. -4*a-4*(-5b)

3. 4*3a-4*2b-4*5

4. -(-7x)-(-7)-(+1)

Answer 2

Sure, let's simplify the expressions by expanding the terms inside the parentheses and applying the appropriate operations:

1. -2(a - 3b + 6) Distribute the -2 to each term inside the parentheses: -2a + 6b - 12

2. (a - 5b) × (-4) Distribute the -4 to each term inside the parentheses: -4a + 20b

3. (3a - 2b - 5) × 4 Distribute the 4 to each term inside the parentheses: 12a - 8b - 20

4. -(-7x - 7 + 1) When you have a double negative, it becomes a positive: 7x + 7 - 1 Simplify the expression: 7x + 6

So, after simplifying the expressions, we have:

1. -2(a - 3b + 6) = -2a + 6b - 12
2. (a - 5b) × (-4) = -4a + 20b
3. (3a - 2b - 5) × 4 = 12a - 8b - 20
4. -(-7x - 7 + 1) = 7x + 6