Simplify the following:

bobbym · 2013-08-08 01:29:21

Hi;

Okay, take all the time you need.

EbenezerSon · 2013-08-08 20:17:58

bobbym wrote:

I was interrupted by some errand, boring one indeed.

Bobbym, it seems you mistakenly made a negative sign a positive sign.
The original is the same as the one Anomnystify solved please check the sign at #244. I mean;
3(x-1)/x-9,

Which you made it
3(x+1)/x^2-9.

Last edited by EbenezerSon (2013-08-08 20:32:27)

bobbym · 2013-08-08 23:55:51

Hi;

I wrote, that there is a mistake in line 2 of post #244

EbenezerSon wrote:

anonimnystefy wrote:
Hi EbenezerSon
With a careful look at signs I think should be,
x-3x-3-3/x^2-9 =
-2x-6/x^2-3^2 =
-2(x+3)/(x-3)(x+3)
= -2/x-3
Please am I right there.
Thanks.

EbenezerSon · 2013-08-10 04:13:56

Please, I mean the problem itself.
You made a negative sign a positive sign.

Here ;

3(x-1). Which you made it 3(x+1).

You check it from one of your post.

bobbym · 2013-08-10 04:23:37

The first line is 3(x+1)

The second line changes that to 3x - 3, that is a mistake.

EbenezerSon · 2013-08-10 04:54:29

Please look at #252.
That is the original question.

The first line is -3(x-1).

And changes the second to be,
-3x+3

bobbym · 2013-08-10 04:58:00

You are not understanding what I am saying. Post #244 is wrong at the second line.

Please post the original problem from the book.

EbenezerSon · 2013-08-10 05:12:22

1/1+3 - 3(x-1)/x^2-9.

That is it.

bobbym · 2013-08-10 05:17:15

And what did you get for an answer?

EbenezerSon · 2013-08-10 05:28:19

I am not at home now, I will post the original when I get there.

Thanks.

bobbym · 2013-08-10 05:30:38

Okay, see you then.

EbenezerSon · 2013-08-11 01:54:51

Hi, Bobbym.

This is the one from the book;

1/x-3 - 3(x-1)/x^2-9

I had -2/x+3 as answer.

bobbym · 2013-08-11 02:02:16

Hi;

That is correct!

EbenezerSon · 2013-08-11 04:02:37

bobbym wrote:

Hi;

How did you get,
9^n+2 * 3^n+2 out of 27^n+2?

I have edited it.

Last edited by EbenezerSon (2013-08-11 04:17:33)

bobbym · 2013-08-11 04:10:03

Hi;

I did not get that. Where does 23^n come from?

EbenezerSon · 2013-08-11 04:21:11

Please, I double check it I have edited.

Thanks.

bobbym · 2013-08-11 04:26:08

27^a = 9^a * 3^a

EbenezerSon · 2013-08-11 04:48:58

It's 27^n+2, and not 27^a.

bobbym · 2013-08-11 04:49:48

You can say a = (n+2), same principle.

27^(n+2) = 9^(n+2) * 3^(n+2)

EbenezerSon · 2013-08-11 05:00:55

I suppose the base must always be the same in each case. So I percieved it to be,

27^n+2=27^n*27^2=3^3n * 3^3+2.

I had thought should be so.

bobbym · 2013-08-11 05:02:00

I am sorry, I can not follow that. Please bracket it off.

EbenezerSon · 2013-08-11 05:10:29

In fact I have not seen an indicial problem being split to get different numbers as the base. like what is in #269.

.Thiş problem is from indices.

bobbym · 2013-08-11 05:13:25

You should learn to latex or to use parentheses better.

That modern notation they are using in that book is not good.

EbenezerSon · 2013-08-11 05:30:07

27^n+2=27^n * 27^2

Thıs is how I mean, I will learn parenthesis in it proper way as you say.

For instance, 6^n+3=6^n * 6^3.

Because, for instance, 3^2 * 3^2=3^(2+2).

What do you say.

bobbym · 2013-08-11 05:34:05

All of that is correct but I have to interpret every bit of it.

When you write 27^n+3 in mathematics that means

It is properly written 27^(n+3) this means

Notice they are both very different.

Math Is Fun Forum

#251 2013-08-08 01:29:21

Re: Simplify the following:

#252 2013-08-08 20:17:58

Re: Simplify the following:

#253 2013-08-08 23:55:51

Re: Simplify the following:

#254 2013-08-10 04:13:56

Re: Simplify the following:

#255 2013-08-10 04:23:37

Re: Simplify the following:

#256 2013-08-10 04:54:29

Re: Simplify the following:

#257 2013-08-10 04:58:00

Re: Simplify the following:

#258 2013-08-10 05:12:22

Re: Simplify the following:

#259 2013-08-10 05:17:15

Re: Simplify the following:

#260 2013-08-10 05:28:19

Re: Simplify the following:

#261 2013-08-10 05:30:38

Re: Simplify the following:

#262 2013-08-11 01:54:51

Re: Simplify the following:

#263 2013-08-11 02:02:16

Re: Simplify the following:

#264 2013-08-11 04:02:37

Re: Simplify the following:

#265 2013-08-11 04:10:03

Re: Simplify the following:

#266 2013-08-11 04:21:11

Re: Simplify the following:

#267 2013-08-11 04:26:08

Re: Simplify the following:

#268 2013-08-11 04:48:58

Re: Simplify the following:

#269 2013-08-11 04:49:48

Re: Simplify the following:

#270 2013-08-11 05:00:55

Re: Simplify the following:

#271 2013-08-11 05:02:00

Re: Simplify the following:

#272 2013-08-11 05:10:29

Re: Simplify the following:

#273 2013-08-11 05:13:25

Re: Simplify the following:

#274 2013-08-11 05:30:07

Re: Simplify the following:

#275 2013-08-11 05:34:05

Re: Simplify the following:

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