Question

Помогите!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answer 1

ОДЗ

x ≠ 2; x ≠ - 2

x(x + 2 ) - 7(x - 2) = 8

x^2 + 2x - 7x + 14 - 8 = 0

x^2 - 5x + 6 = 0

D = 25 - 4*6 = 1

x1 = (5 + 1)/2 = 6/2 = 3

x2 = (5 - 1)/2 = 4/2 = 2 (не удовлет ОДЗ)

ОТВЕТ

x = 3

Answer 2

Пойми эту тему и все будет легко.