SOLUTION: Log (x)+ log (x-2)=log8

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Question 1007070: Log (x)+ log (x-2)=log8
Answer by ikleyn(52788)   (Show Source): You can put this solution on YOUR website!
.
log (x)+ log (x-2) = log(8) -----> x*(x-2) = 8 -----> 

 = .   (1)

Factorize:

 = (x+2)*(x-4).

So the roots of the equation (1) are x = -2 and x = 4. 


The root x = -2 doesn't work because of logarithm . . . 

The root x = 4 works well.


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