СРОЧНО ДАЮ 25б
Помогите

Ответ:

2. x³ + 6x² + 12x + 8 = 0

(x + 2)³

x+2=0

x = -2

3. (31² - 29²)/(31²+ 29²)

(961 - 1 × 841)/(31²+ 29²)

(961 - 841)/(31² + 29²)

120/(31² + 29²)

120/(961 + 841)

120/1802

60/901

(0,0666)