Question

sa imi explice cineva cum se face asta log o baza 2 din (x patrat -1 )=1

Answer 1

     
$log_2(x^2-1)=1 \\ 2^1 =(x^2-1) \\ x^2 -1=2 \\ x^2 =2+1 \\ x^2 =3 \\ x = \;\;\pm \sqrt{3} \\ x_1=\boxed{\sqrt{3} } \\ x_2=\boxed{-\sqrt{3} }$