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toadytica305
Group Title
How do you solve when you have logs on one side but not the other? (2 problems inside)
 one year ago
 one year ago
toadytica305 Group Title
How do you solve when you have logs on one side but not the other? (2 problems inside)
 one year ago
 one year ago

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mathg8 Group TitleBest ResponseYou've already chosen the best response.0
use the product rule log A + log B = log (AB)
 one year ago

toadytica305 Group TitleBest ResponseYou've already chosen the best response.0
I tried that... for Log x + log (x+15) = 2 I have (Log x)(log (x+15)) =2 i dont know what to do after The answer is 5
 one year ago

saifoo.khan Group TitleBest ResponseYou've already chosen the best response.0
\[\lg x(x+15) = 2\]
 one year ago

RadEn Group TitleBest ResponseYou've already chosen the best response.2
convert 2 to log 100
 one year ago

AravindG Group TitleBest ResponseYou've already chosen the best response.0
log x+log (x+15)=log(x(x+15))!!
 one year ago

RadEn Group TitleBest ResponseYou've already chosen the best response.2
it just a hint, so that both sides have log's :)
 one year ago

toadytica305 Group TitleBest ResponseYou've already chosen the best response.0
But how do you go from log(x(x+15)=2.. to x=5? I can't get that part
 one year ago

RadEn Group TitleBest ResponseYou've already chosen the best response.2
log(x(x+15))=2 log(x(x+15)=log100 cancel out the log, giving us : x(x+15)=100 or x^2+15x100=0 solve for x by factorization or by complete square or by quadratic formula
 one year ago

toadytica305 Group TitleBest ResponseYou've already chosen the best response.0
Yes! Just solved it.. thank you!
 one year ago

toadytica305 Group TitleBest ResponseYou've already chosen the best response.0
I didn't think of doing log 100 to cancel the logs on both sides
 one year ago
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