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OpenstudyUserBest ResponseYou've already chosen the best response.0
I thought you were soo smart, that you would know them by now. LOL jk jk.
 one year ago

saifoo.khanBest ResponseYou've already chosen the best response.1
Lol. I'm not a calculator. I can get stuck too! :P @OpenstudyUser
 one year ago

OpenstudyUserBest ResponseYou've already chosen the best response.0
Try distributing.
 one year ago

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

saifoo.khanBest ResponseYou've already chosen the best response.1
Just tell me the next and step after that please.
 one year ago

hartnnBest ResponseYou've already chosen the best response.1
write 9^(x+1) as 9^x.9 then put y=9^x. solve the quadratic
 one year ago

saifoo.khanBest ResponseYou've already chosen the best response.1
DANG!!! KILL ME!!!! My teacher told me that. _ Thanks for recalling @hartnn
 one year ago

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

saifoo.khanBest ResponseYou've already chosen the best response.1
Next? @micahwood50
 one year ago

hartnnBest ResponseYou've already chosen the best response.1
didn't i tell u to do just that?
 one year ago

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

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

saifoo.khanBest ResponseYou've already chosen the best response.1
I see. THanks man.
 one year ago

saifoo.khanBest ResponseYou've already chosen the best response.1
Did you missed a +sign in your first step? @micahwood50
 one year ago

saifoo.khanBest ResponseYou've already chosen the best response.1
@OpenstudyUser kept on distributing. :D
 one year ago

OpenstudyUserBest ResponseYou've already chosen the best response.0
I atleast tried _
 one year ago

micahwood50Best ResponseYou've already chosen the best response.0
Just do what hartnn told you to do.
 one year ago

saifoo.khanBest ResponseYou've already chosen the best response.1
I want to learn your method too! @micahwood50
 one year ago

micahwood50Best ResponseYou've already chosen the best response.0
My "method" is incorrect. I just though lnab = ln (a + b), but it's actually lna + lnb so forgot it.
 one year ago

saifoo.khanBest ResponseYou've already chosen the best response.1
Oh. No problem. Thanks for trying though. :)
 one year ago

saifoo.khanBest ResponseYou've already chosen the best response.1
I solved it @hartnn . got: x = 0.315
 one year ago

hartnnBest ResponseYou've already chosen the best response.1
what roots of quadratic did u get?
 one year ago

hartnnBest ResponseYou've already chosen the best response.1
yup. can't be 20 so 9^x=2 x=0.315 u are correct!
 one year ago
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