Question

3/х+1 + 5/х-1. Алгебра 8 класс

Answer 1

3/х+1 + 5/х-1 = 3(х-1)/(х+1)(х-1) + 5(х+1)/(х+1)(х-1) = 3х - 3 + 5х + 5 /(х+1)(х-1) = 8х + 2 / (х + 1)(х - 1) = 2 (4х + 1) / (х + 1)(х - 1) = 2 (4х + 1) / х² - 1

Answer 2

Вот откуда только 8(х - 1) / (х+1)(х-1)

Answer 3

3/х+1 + 5/х-1 = 3(х-1)/(х+1)(х-1) + 5(х+1)/(х+1)(х-1) = 3х - 3 + 5х + 5 /(х+1)(х-1) = 8х + 2 / (х + 1)(х - 1) = 2 (4х + 1) / (х + 1)(х - 1) = 2 (4х + 1) / х^2 - 1

Answer 4

Все равно ответ не сходится