Question

Log (x-1) + log (x+1)=3
Solve for x

Answer 1

log (x-1)/(x+1) = log 10^3 ;
`(x-1)/(x+1)` = 1000; x-1 = (x+1)*1000 ; x-1 = 1000x + 1000 ; 999x = -1001 ; x = -1001/999 ; x ≈ -1