Sunday

August 31, 2014

August 31, 2014

Posted by **HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!** on Wednesday, February 25, 2009 at 8:08pm.

Log X + Lob (X-3) = 1

I know I do this

Log X(X-3)=1

then I do this

Log X^(2) - 3X = 1

then I do this

2 Log (X-3X) = 1

then

2 Log (-2X) = 1

then

(2 Log (-2X) = 1)(1/2)

Log (-2X) = 1/2

then

(Log (-2X) = 1/2)(-1/2)

Log X = (-1/4)

then

by def

10^ (-1/4) = X

I get something under one and calculator tells me I can't do that I think I'm doing something wrong what do I do?

- Algebra 2 -
**bobpursley**, Wednesday, February 25, 2009 at 8:11pmLog X + Lob (X-3) = 1

I know I do this

Log X(X-3)=1

Then take the antilog of each side

x(x-3)=0

Now solve it.

- Algebra 2 -
**HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!**, Wednesday, February 25, 2009 at 8:12pmwhat exactly is antilog?

- Algebra 2 -
**Reiny**, Wednesday, February 25, 2009 at 8:16pmyour notation at Log X^(2) - 3X = 1 is sloppy

say: Log (X^(2) - 3X) = 1

your next line of 2 Log (X-3X) = 1

is WRONG

from Log (X^(2) - 3X) = 1 by definition of logs

x^2 - 3x = 10^1

x^2 - 3x - 10 = 0

(x-5)(x+2) = 0

x = 5 or x = -2

but in logx, x > 0, so

x = 5

check: if x=5

LS = log5 + log2

= log(5x2)

= log 10

= 1

= RS

- Algebra 2 -
**Anonymous**, Wednesday, February 25, 2009 at 8:28pmANSWER=3

- Algebra 2 -
**HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!**, Wednesday, February 25, 2009 at 8:31pmok um so

Log (X^(2) - 3X) = 1

x^2 - 3x = 10^1

what allows you to put in the value ten and get ride of the log on the other side? What if the value wasn't one would u just do 10^X?

x^2 - 3x - 10 = 0

(x-5)(x+2) = 0

x = 5 or x = -2

- Algebra 2 -
**Reiny**, Wednesday, February 25, 2009 at 8:33pmNO, it is x=5

I verified it

Here is yours:

if x=3

LS= log3 + log1

= log(3x1)

= log 3 which is not equal to the RS of 1

- Algebra 2 -
**Reiny**, Wednesday, February 25, 2009 at 8:38pmLOG

_{b<?sub> a = c <----> bc = a e.g. log2 8 = 3 <---> 23 = 8 } - Algebra 2 -
**Reiny**, Wednesday, February 25, 2009 at 8:39pmlet's try that again

LOG_{b}a = c <----> b^{c}= a

e.g.

log_{2}8 = 3 <---> 2^{3}= 8

- Algebra 2 -
**HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!**, Wednesday, February 25, 2009 at 8:41pmok um so

Log (X^(2) - 3X) = 1

x^2 - 3x = 10^1

what allows you to put in the value ten and get ride of the log on the other side? What if the value wasn't one would u just do 10^X?

x^2 - 3x - 10 = 0

(x-5)(x+2) = 0

x = 5 or x = -2

**Related Questions**

math - Logarithm!!! Select all of the following that are true statements: (a) ...

Math Help Please - Which of the following expressions is equal to log (x sqrt-y...

Mathematics - Prove that log a, log ar, log ar^2 is an a.p. Is the following ...

college algebra - Write expression as one logarithm and simplify if appropriate...

math(Please help) - 1) use the properties of logarithms to simplify the ...

math - write as a single logarithm: -2logbase3(1/x)+(1/3)logbase3(square root of...

Trigonometry - This is a logs question If u=x/y^2, which expression is ...

Algebra 2 - -Explain the difference between log base b (mn) and ( log base b of ...

Math/trig - Log radical b/ a^2 is equivalent to 1) 1/2 log b + 1/2 log a 2) l/2 ...

TRig WIth LoGs help1!! - i have problem i can't solve and the book is no help.. ...