SOLUTION: log8 (x+1) + log8 (x+3)=log8 34

Question 333377: log8 (x+1) + log8 (x+3)=log8 34
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
log8 (x+1) + log8 (x+3)=log8 34
same as
log8 [(x+1)(x+3)] = log8 (34)
we don't need the log8, now
[(x+1)(x+3)] = (34)
FOIL
x^2 + 4x + 3 = 34
:
x^2 + 4x + 3 - 34 = 0
:
x^2 + 4x - 31 = 0
solve this using the quadratic formula
positive solution ~ 3.916
RELATED QUESTIONS
Log8... (answered by Fombitz)

log8^x/2=log8^x/log8^2 (answered by Alan3354)

log8 1/64... (answered by robertb)

log8... (answered by jim_thompson5910,fcabanski)

log8 (answered by stanbon,lynnlo)

log8^(sqrt... (answered by lwsshak3)

solve for x... (answered by nerdybill)

log8(x-5)=2/3 (answered by MathLover1,MathTherapy)

Evaluate Log8... (answered by lwsshak3)