SOLUTION: Solve for x: log(x+1) + (log(x-1) = log8.

SOLUTION: Solve for x: log(x+1) + (log(x-1) = log8.

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Question 387299: Solve for x: log(x+1) + (log(x-1) = log8.
Answer by nerdybill(7384) (Show Source): You can put this solution on YOUR website!
log(x+1) + (log(x-1) = log8
log(x+1)(x-1) = log8
log(x^2-1) = log8
x^2-1 = 8
x^2 = 9
x = {-3, 3}
Testing for extraneous solutions eliminates -3 leaving you with:
x = 3

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