Question

(10a-6b+5c-4d)-(9a-2b-4c+2d)

Answer 1

(10a-6b+5c-4d)-(9a-2b-4c+2d)

1) Раскрываем скобки:
10a-6b+5c-4d-9a+2b+4c-2d

2) Приводим подобные:
а-4b+9c-6d

Ответ: а-4b+9c-6d

Answer 2

To simplify the expression (10a-6b+5c-4d)-(9a-2b-4c+2d), we can distribute the negative sign to each term inside the second parentheses and then combine like terms. Let's go step by step:

1. Distribute the negative sign to each term inside the second parentheses: (10a - 6b + 5c - 4d) - 9a + 2b - 4c + 2d

2. Now, combine like terms. Starting with the 'a' terms: 10a - 9a = a

3. Next, combine the 'b' terms: -6b + 2b = -4b

4. Combine the 'c' terms: 5c - 4c = c

5. Finally, combine the 'd' terms: -4d + 2d = -2d

Putting it all together, the simplified expression is: a - 4b + c - 2d