Question

1. 5/(x – 1) – 3/(x + 1) = 15/(x2 – 1)

Answer 1

Ответ:

спільний знаменник х^2 - 1 = ( Х - 1 )( Х + 1 )

5( Х + 1 ) - 3( Х - 1 ) = 15

5х + 5 - 3х + 3 = 15

2х = 15 - 8

Х = 7 : 2

Х = 3,5