Question

-2,4a*(-5b) 9a-a-8b+3b a+(a-10)-(15+a) -4(b-4)+7(b+2)

Answer 1

Ответ:

1) 12ab

2) 8a - 5b

3) a-25

4) 3b + 30

Answer 2

Let's simplify each expression step by step:

1. -2 * 4a * (-5b) Result: 40ab

2. 9a - a - 8b + 3b Combine like terms: Result: 8a - 5b

3. a + (a - 10) - (15 + a) Remove parentheses and combine like terms: a + a - 10 - 15 - a 2a - 10 - 15 2a - 25

4. -4(b - 4) + 7(b + 2) Distribute the negative and positive signs: -4b + 16 + 7b + 14 Combine like terms: 3b + 30

So, the simplified expressions are:

1. 40ab
2. 8a - 5b
3. 2a - 25
4. 3b + 30