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Mathematics 15 Online
OpenStudy (anonymous):

Please help me solve this problem.

OpenStudy (anonymous):

\[1/2-\log_{16} (x)=\log_{16} (x+3)\]

OpenStudy (anonymous):

put all logs on one side then add them by using log a+ logb = logab then use log a with base b=C then a=b^C so this is how it goes 1/2 = log x + log (x+3) = log x(x+3) = log(x^2 +3x) so then x^2 + 3x = 16^1/2 = 4 so it becomes a quadratic formula x^2 + 3x -4=0 so if you factorise (x-1)(x+4) =0 answers are x=1 and X=-4

OpenStudy (anonymous):

why is it log(x^2+3x)? What happened to base 16?

OpenStudy (anonymous):

I didnt see the equation button but you must put the base 16 in since they are the same you can add or take away

OpenStudy (anonymous):

So... I can solve it without base 16 because they are all under the same base?

OpenStudy (anonymous):

Yes that is why I wrote 16^1/2 because base is 16

OpenStudy (anonymous):

Oh.. okay. I understand now. thanks. :D

OpenStudy (anonymous):

ok going to bed now

OpenStudy (anonymous):

Goodnight!

OpenStudy (anonymous):

good night

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