SOLUTION: why isn't ln(12 + x) = (ln12)(lnx), What is the rule that disproves this. Thanks

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Question 316967: why isn't ln(12 + x) = (ln12)(lnx), What is the rule that disproves this.
Thanks
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
There is no rule to disprove it but there clearly isn't a rule that proves it.
You only need one example to disprove it.
Example:ln%2812%2B0%29=ln%2812%29%2Aln%280%29 doesn't work since ln%280%29 is undefined but yet ln(12) is defined.
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ln%28AB%29=ln%28A%29%2Bln%28B%29 is the only rule that really works.