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GOODMAN
 3 years ago
I forgot logarithms :/
log_5(8r7)=log_5(r^2+5)
GOODMAN
 3 years ago
I forgot logarithms :/ log_5(8r7)=log_5(r^2+5)

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asnaseer
 3 years ago
Best ResponseYou've already chosen the best response.2if:\[\log_bA=\log_bB\implies A=B\]

GOODMAN
 3 years ago
Best ResponseYou've already chosen the best response.0So all I need to do is set them equal to eachother? Sorry, I kinda forgot all this, and studying again.

asnaseer
 3 years ago
Best ResponseYou've already chosen the best response.2yes, so assuming your question is:\[\log_5(8r7)=\log_5(r^2+5)\]then you would have:\[8r7=r^2+5\]solve this for r.

GOODMAN
 3 years ago
Best ResponseYou've already chosen the best response.0Okay, but if i were to have something like: log_9(x+4)+log_9(x4)=1

asnaseer
 3 years ago
Best ResponseYou've already chosen the best response.2then you would use the rule:\[\log_bA+\log_bB=\log_b(A*B)\]

GOODMAN
 3 years ago
Best ResponseYou've already chosen the best response.0Ohhhh, okay, these rules are making its simple, are there any other important so I can study them? If you dont mind posting..

GOODMAN
 3 years ago
Best ResponseYou've already chosen the best response.0Perfect, thanks soo much!!
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