simplify rational expression...

2n/n-4
n=

6/x+3
x=
and

3b/b(b+9)
b=

Question

simplify rational expression...

2n/n-4
n=

6/x+3
x=
and 

3b/b(b+9)
b=

solomonzelman · Answer

$\color{#000000 }{ \displaystyle \frac{ 2n}{n} -4 }$

like this?

anonymous · Answer

the n-4 is together under the 2n

solomonzelman · Answer

$\color{#000000 }{ \displaystyle \frac{ 2n}{n-4} }$

solomonzelman · Answer

Is that equal to something, or just that fraction to simplify?

anonymous · Answer

yes

anonymous · Answer

it says to simplify the rational expression

solomonzelman · Answer

Well, I don't really see a way to "simplify" this ... you can do this ...

$\color{#000000 }{ \displaystyle \frac{ 2n}{n-4}= \frac{ 2n-8+8}{n-4} = \frac{ 2n-8}{n-4}+ \frac{ 8}{n-4}= \frac{ 2(n-4)}{n-4}+ \frac{ 8}{n-4}}$

and then cancel the (n-4) on top and bottom

anonymous · Answer

okay what about the other two

anonymous · Answer

6/x+3 and 3b/b(b+9)
anyone please?

fibonaccichick666 · Answer

the reason you (probably) are not getting answers is due to the questions a and b making minimal sense.

anonymous · Answer

i think that's the issue.. I'm trying to help my cousin with her homework but neither of us are understanding.

fibonaccichick666 · Answer

You stated that there is no equals sign and that you are supposed to be simplifying the fraction, but in a and b, most would consider those simplified

fibonaccichick666 · Answer

can you take a picture?

anonymous · Answer

i can

fibonaccichick666 · Answer

I can then look at the context and see if it is poorly worded or if there is something missing

anonymous · Answer

I'm trying to post it give me a second

fibonaccichick666 · Answer

okie

anonymous · Answer

How do I post from a cell phone?

anonymous · Answer

Or do I have to do it from the laptop? I have open study open on both

anonymous · Answer

It says "simplifying rational expressions find the excluded value(s) for each rational expression"

anonymous · Answer

Then states the questions 

2n/n-4 
N=

And then the other two

fibonaccichick666 · Answer

I think you can upload a pic with a cell

fibonaccichick666 · Answer

OH

fibonaccichick666 · Answer

Wow, ok this is poorly worded.  The problem wants you to find the values that make the fraction undefined/indeterminate.  IE denominator is equal to zero

fibonaccichick666 · Answer

that's what an excluded value is

anonymous · Answer

Okay

fibonaccichick666 · Answer

so in the first one, what will x have to equal for the bottom to equal zero?

fibonaccichick666 · Answer

sorry, n*

fibonaccichick666 · Answer

can you get it from here?