Question

(a+3)(a+0)-(a+7)(a-4)

Answer 1

Ответ:

-28

Объяснение:

раскрой просто скобки

a^2+3a+4a-7a-28

Answer 2

Ответ:

28

Объяснение:

(a+3)(a+0)-(a+7)(a-4)

(a+3)*a-(a+7)*(a-4)

a^2+3a-(a^2-4a+7a-28)

a^2+3a-(a^2+3a-28)

a^2+3a-a^2-3a+28

(Сократим а^2 и -а^2,3а и -3а)

Получаем 28

Answer 3

To simplify the expression (a+3)(a+0)-(a+7)(a-4), you can use the distributive property (FOIL method) to expand both parts of the expression and then combine like terms. Here are the steps:

1. Expand the first part: (a+3)(a+0) (a+3)(a) + (a+3)(0) = a^2 + 3a

2. Expand the second part: (a+7)(a-4) (a+7)(a) - (a+7)(4) = a^2 + 7a - 4a - 28

3. Now, subtract the second part from the first part: (a^2 + 3a) - (a^2 + 7a - 4a - 28)

4. Combine like terms in the expression: a^2 + 3a - (a^2 + 3a - 28)

5. Distribute the negative sign inside the parentheses: a^2 + 3a - a^2 - 3a + 28

6. The a^2 terms cancel out: 0a^2 + 0a + 28

7. Simplify: 0a + 28 = 28

So, the simplified expression is 28.