Log3 (x-1) + log3 (x+1) =1

Question

Log3 (x-1) + log3 (x+1) =1

Answer 1

Log3 (x-1)+log3 (x+1)=1
log3 ((x-1)*(x+1))=1
(x-1)(x+1)=3
x^2-1=3
x^2=4
x=2 или x=-2
Ответ: 2 или -2