Question

1. (х +3)²=

2. (5+2у)²=

3. (7а-6b)²=

4. 1 2/3х²+ 2 2/5 у)²=

5. 9х² -6х+1=

6. 24аb+ 36a² +4b²=

Answer 1

Ответ:

1. (x + 3)² = x² + 2(x)(3) + 3²

= x² + 6x + 9

(x + 3)² = x² + 6x + 9.

2. (5 + 2у)² = 5² + 2(5)(2у) + (2у)²

= 25 + 20у + 4у²

(5 + 2у)² = 25 + 20у + 4у²

3. (7а - 6b)² = (7а)² + 2(7а)(-6b) + (-6b)²

= 49а² - 84ab + 36b²

(7а - 6b)² = 49а² - 84ab + 36b²

ОСТАЛЬНОЕ НЕ ЗНАЮ.