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Mathematics 7 Online
OpenStudy (anonymous):

http://oi42.tinypic.com/2zgdjs0.jpg How would I solve this? I tried to multiply the (x+23) and the (x+8) and then set that to exponential form but then I got some weird answer that I'm sure is wrong.

OpenStudy (anonymous):

you seem to have been on the right track. it simplifies to: \[\log_{4} ((x+23)(x+8))\]

OpenStudy (anonymous):

which simplifies to: log_{4} (x^2 + 31x + 184) = 2

OpenStudy (anonymous):

to get rid of the log4(x) you do the inverse operation which is 4^[x] so x^2 + 31x +184 = 4^2

OpenStudy (anonymous):

I got stuck when I got to \[x^2+31x=-168\]

OpenStudy (anonymous):

x=-7 or -24

OpenStudy (anonymous):

\[\log_{4} (x+23)(x+8)=\log_{4} 16\] simplifies to \[x ^{2}+31x+168\] which simplifies to \[(x+7)(x+24)\]

OpenStudy (anonymous):

Thanks :)

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