Question

1. (а – 7)2 2. (х + 4)2 3.(2 – a)2 4. (8 + x)2 5. (5а – 1)2 6. (10 + 4с)2 7. (3х – 2)2 8. (5х + 9)2 9. (- 5а – 8b)2

Answer 1

1. 2а-14
2. 2х+8
3.4-2а
4.16+2х
5.10а-2
6.20+8с
7.6х-4

Answer 2

Ответ:

1. a^2 - 14a + 49

2. x^2 + 8x + 16

3. 4 - 4a + a^2

4. 64 + 16x + x^2

5. 25a^2 - 10a + 1

6. 100 + 80c + 16c^2

7. 9x^2 - 12x + 4

8. 25x^2 +90x + 81

9. 25a^2 + 80ab + 64b^2

Объяснение:

Answer 3

It seems like you want to expand the given expressions. To expand a square of a binomial expression, you can use the formula:

(a + b)^2 = a^2 + 2ab + b^2

Let's apply this formula to each of the given expressions:

1. (a - 7)^2 = a^2 - 2 * a * 7 + 7^2 = a^2 - 14a + 49
2. (x + 4)^2 = x^2 + 2 * x * 4 + 4^2 = x^2 + 8x + 16
3. (2 - a)^2 = 2^2 - 2 * 2 * a + a^2 = 4 - 4a + a^2
4. (8 + x)^2 = 8^2 + 2 * 8 * x + x^2 = 64 + 16x + x^2
5. (5a - 1)^2 = (5a)^2 - 2 * 5a * 1 + 1^2 = 25a^2 - 10a + 1
6. (10 + 4c)^2 = 10^2 + 2 * 10 * 4c + (4c)^2 = 100 + 80c + 16c^2
7. (3x - 2)^2 = (3x)^2 - 2 * 3x * 2 + 2^2 = 9x^2 - 12x + 4
8. (5x + 9)^2 = (5x)^2 + 2 * 5x * 9 + 9^2 = 25x^2 + 90x + 81
9. (-5a - 8b)^2 = (-5a)^2 + 2 * (-5a) * (-8b) + (-8b)^2 = 25a^2 + 80ab + 64b^2

These are the expanded forms of the given expressions. If you have any specific questions or need further assistance, feel free to ask!