Сергей Янков
Оракул
(54197)
1 месяц назад
x+2/x-4 - 48/x^2-16 = 13/7
ОДЗ: х ≠ 4; -4
x^2+2x+4x+8/x^2-16 - 48/x^2-16 = 13/7
x^2+6x-40/x^2-16 = 13/7
13x^2-208 = 7x^2+42x - 280
6x^2 - 42x + 72 = 0
x^2 - 7x + 12 = 0
x1+x2 = 7
x1*x2 = 12
x1 = 3
x2 = 4
x = 3