Question

(a + 1)(a - 1) - 2 ( a - 1) =​

Answer 1

Respuesta:

(a+1) (a-1) -2 (a-1) =

(a+1)(a-1)= 2(a-1)

(a+1)(a-1) = 2

(a-1)

a+ 1 = 2

a = 2 - 1

a = 1