A community for students. Sign up today!
Here's the question you clicked on:
 0 viewing

This Question is Closed

OpenstudyUser
 2 years ago
Best ResponseYou've already chosen the best response.0I thought you were soo smart, that you would know them by now. LOL jk jk.

saifoo.khan
 2 years ago
Best ResponseYou've already chosen the best response.1Lol. I'm not a calculator. I can get stuck too! :P @OpenstudyUser

OpenstudyUser
 2 years ago
Best ResponseYou've already chosen the best response.0Try distributing.

saifoo.khan
 2 years ago
Best ResponseYou've already chosen the best response.1\[ \Large 9^{2x} + 2(9^{x+1}) = 40 \] Correction^

saifoo.khan
 2 years ago
Best ResponseYou've already chosen the best response.1Just tell me the next and step after that please.

hartnn
 2 years ago
Best ResponseYou've already chosen the best response.1write 9^(x+1) as 9^x.9 then put y=9^x. solve the quadratic

saifoo.khan
 2 years ago
Best ResponseYou've already chosen the best response.1DANG!!! KILL ME!!!! My teacher told me that. _ Thanks for recalling @hartnn

saifoo.khan
 2 years ago
Best ResponseYou've already chosen the best response.1Just guessing, can't we do it like this? \[9^{2x} + 2(9^x \times 9) = 40\] Ans so on?

hartnn
 2 years ago
Best ResponseYou've already chosen the best response.1didn't i tell u to do just that?

saifoo.khan
 2 years ago
Best ResponseYou've already chosen the best response.1Yes, but you said me to write 9^x = y Got that. But can't we solve it by another way? Something like: \[9^{2x} + 2(9^x)\times 18=40\]

hartnn
 2 years ago
Best ResponseYou've already chosen the best response.1nopes, i don't think so....no formula for log(a+b) or log (ab)

saifoo.khan
 2 years ago
Best ResponseYou've already chosen the best response.1Did you missed a +sign in your first step? @micahwood50

saifoo.khan
 2 years ago
Best ResponseYou've already chosen the best response.1@OpenstudyUser kept on distributing. :D

OpenstudyUser
 2 years ago
Best ResponseYou've already chosen the best response.0I atleast tried _

micahwood50
 2 years ago
Best ResponseYou've already chosen the best response.0Just do what hartnn told you to do.

saifoo.khan
 2 years ago
Best ResponseYou've already chosen the best response.1I want to learn your method too! @micahwood50

micahwood50
 2 years ago
Best ResponseYou've already chosen the best response.0My "method" is incorrect. I just though lnab = ln (a + b), but it's actually lna + lnb so forgot it.

saifoo.khan
 2 years ago
Best ResponseYou've already chosen the best response.1Oh. No problem. Thanks for trying though. :)

saifoo.khan
 2 years ago
Best ResponseYou've already chosen the best response.1I solved it @hartnn . got: x = 0.315

hartnn
 2 years ago
Best ResponseYou've already chosen the best response.1what roots of quadratic did u get?

hartnn
 2 years ago
Best ResponseYou've already chosen the best response.1yup. can't be 20 so 9^x=2 x=0.315 u are correct!
Ask your own question
Ask a QuestionFind more explanations on OpenStudy
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.