- #1
skg94
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Homework Statement
Solve for x
logbase 4 for question 1.
1. log (x+2) - log (x-4) =1/2
log base 2:
2. log (3x+1) = 2 - log (x-1)
log base 10:
3. log sq root (x^2 -21x) =1
similar just different numbers..
log (x-4) - log (x+2) =4 base 2
log (x-4)=4-log(x+2)
log (x^2-2x)^7=21
Homework Equations
Log laws
The Attempt at a Solution
1. log (x+2)/(x-4) = 1/2 - is that right or is it log (x+2) = 1/2 + log (x-4) then cancel the logs. I don't know. When i tried it both didnt work. Maybe i calculated it wrong if its set up right.
2. (3x+1)(x-1) = 2
3x^2-2x-1=2
3x^2-2x-3 - what do i do from here?
3. If you square both sides, or times the square and x by .5 and equal it to zero, i don't know what to do, same process of solving for the later 3 I am pretty sure I am having difficulty with these.
Any help please