Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing
How do you solve when you have logs on one side but not the other? (2 problems inside)
 one year ago
 one year ago
How do you solve when you have logs on one side but not the other? (2 problems inside)
 one year ago
 one year ago

This Question is Closed

mathg8Best ResponseYou've already chosen the best response.0
use the product rule log A + log B = log (AB)
 one year ago

toadytica305Best 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.khanBest ResponseYou've already chosen the best response.0
\[\lg x(x+15) = 2\]
 one year ago

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

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

toadytica305Best 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

RadEnBest 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

toadytica305Best ResponseYou've already chosen the best response.0
Yes! Just solved it.. thank you!
 one year ago

toadytica305Best 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
See more questions >>>
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.