Question

quien lo hace ...................

Answer 1

Respuesta:

(2x - 3) / (x - 1) + 1 / (x - 1) = (x + 4) / (x + 1) 
(2x - 3 + 1) / (x - 1) = (x + 4) / (x + 1) 
(2x - 2) / (x - 1) = (x + 4) / (x + 1)  
2(x - 1) / (x - 1) = (x + 4) / (x + 1) 
2 = (x + 4) / (x + 1) 
2(x + 1) = (x + 4) 
2x + 2 = x + 4
2x - x = 4 - 2
x = 2

x² - 1 = 2² - 1
x² - 1 = 4 - 1

x² - 1 = 3