Вопрос:

12. (-5 - 2a)^2

Ответ:

(-5 - 2a)^2 = 25 + 20a + 4a^2

1. (x - 4)^2
2. (5 - x)^2
3. (0.5a - b)^2
4. (3x - 2)^2
5. (5m + 3n)^2
6. (0.4a - 5b)^2
7. (8x + 1/2y)^2
8. (b^2 - 3)^2
9. (y^2 - 2y)^2
10. (m^3 + n^2)^2
11. (-7x + 3y^3)^2
12. (-5 - 2a)^2
13. (2 1/4a + 1 2/3b)^2
14. (6pq^2 - qp^2)^2
15. (2x^4 + 5x^3b^5)^2