Simplify the following:

bobbym · 2014-09-06 13:45:00

Did you understand what was done in post #449?

EbenezerSon · 2014-09-07 03:57:41

Yes, I do.

bobbym · 2014-09-07 04:00:15

What do you want to do from there?

EbenezerSon · 2014-09-07 04:06:34

I want to move log2 to the right handside

Last edited by EbenezerSon (2014-09-07 04:13:10)

bobbym · 2014-09-07 04:12:16

We already have a log(2) on the RHS.

EbenezerSon · 2014-09-07 04:15:30

Then multiplying 3x through.

bobbym · 2014-09-07 04:21:06

That will not do anything to help. You can not cancel the 3x in the denominator.

EbenezerSon · 2014-09-07 04:29:19

Then taking antilog, will tha help?

bobbym · 2014-09-07 04:31:52

I have no idea what you want to do. I guess I have got jumbled up.

EbenezerSon · 2014-09-07 04:35:25

No don't. What I have said so far is what the book used to solve similar ones. Please, then help me

bobbym · 2014-09-07 04:38:49

I would but I do not know what you want to do. Let's start at the beginning maybe?

EbenezerSon · 2014-09-07 04:49:22

Ok,

x^2 + 2 = 3x
x^2 - 3x + 2 = taking log
Log(x^2/3x) + log2 = o

This is how I would solve it.

bobbym · 2014-09-07 04:54:13

Hi;

If we are starting with a quadratic

do we really need logs to solve it?

EbenezerSon · 2014-09-07 04:59:32

In fact I factorised it and had 1 or 2 as answers. But since you suggested that log should be used so I agreed. Actually, wanted to learn more of log that is why I did not tell you that I have factorised

bobbym · 2014-09-07 05:02:49

Forget about the use of a log on this one. The factoring you have done is fine.

EbenezerSon · 2014-09-07 05:07:32

Please if you wouldn't mind use log to solve it completely, and let me see how you would have solve it by using log, please!

bobbym · 2014-09-07 05:12:50

I do not if it can be solved by a log but give me some time.

EbenezerSon · 2014-09-07 05:17:57

Ok, I get you, thank you!

bobbym · 2014-09-07 05:19:22

If we now take the log of both sides we can do the right side but not the left. I would say it can not be done using logs.

EbenezerSon · 2014-09-07 05:27:36

How about if the 3x had been x^2? Could one use log?

Last edited by EbenezerSon (2014-09-07 05:32:04)

bobbym · 2014-09-07 05:30:54

You would then have x^2 -x^2 +2 = 0 which is not even an equation.

EbenezerSon · 2014-09-07 05:36:17

Errr, ok, I see. I have another, but maybe tommorow or today would post it.

bobbym · 2014-09-07 05:37:30

Take a break if you need it. Or if you are feeling refreshed then post it.

EbenezerSon · 2014-09-07 05:43:17

Find X;

Log(3x - 1) - log2 = 3

That is it.

bobbym · 2014-09-07 05:49:27

Okay so far?

Math Is Fun Forum

#451 2014-09-06 13:45:00

Re: Simplify the following:

#452 2014-09-07 03:57:41

Re: Simplify the following:

#453 2014-09-07 04:00:15

Re: Simplify the following:

#454 2014-09-07 04:06:34

Re: Simplify the following:

#455 2014-09-07 04:12:16

Re: Simplify the following:

#456 2014-09-07 04:15:30

Re: Simplify the following:

#457 2014-09-07 04:21:06

Re: Simplify the following:

#458 2014-09-07 04:29:19

Re: Simplify the following:

#459 2014-09-07 04:31:52

Re: Simplify the following:

#460 2014-09-07 04:35:25

Re: Simplify the following:

#461 2014-09-07 04:38:49

Re: Simplify the following:

#462 2014-09-07 04:49:22

Re: Simplify the following:

#463 2014-09-07 04:54:13

Re: Simplify the following:

#464 2014-09-07 04:59:32

Re: Simplify the following:

#465 2014-09-07 05:02:49

Re: Simplify the following:

#466 2014-09-07 05:07:32

Re: Simplify the following:

#467 2014-09-07 05:12:50

Re: Simplify the following:

#468 2014-09-07 05:17:57

Re: Simplify the following:

#469 2014-09-07 05:19:22

Re: Simplify the following:

#470 2014-09-07 05:27:36

Re: Simplify the following:

#471 2014-09-07 05:30:54

Re: Simplify the following:

#472 2014-09-07 05:36:17

Re: Simplify the following:

#473 2014-09-07 05:37:30

Re: Simplify the following:

#474 2014-09-07 05:43:17

Re: Simplify the following:

#475 2014-09-07 05:49:27

Re: Simplify the following:

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