GCf of the rational epression.

Question

dannyrod2000 · Answer

anonymous · Answer

The first thing that you will need to do is simplify your expression by factoring your trinomial. The GCF will be the largest factor that both the numerator and the denominator have in common.

jdoe0001 · Answer

hmmm can you factor the denominator?

dannyrod2000 · Answer

can you help me with that please?

jdoe0001 · Answer

hmm have you done factoring of quadratics yet?

dannyrod2000 · Answer

yea but i don't gt it right all the time.

anonymous · Answer

What are the possible numbers when multiplied together give you 8?

dannyrod2000 · Answer

4*2

jdoe0001 · Answer

$\large \begin{array}{cccllll}
x^2&-2x&-8\
&\uparrow &\uparrow \
&2-4&2\cdot -4
\end{array}$   any ideas on what it factors to?

dannyrod2000 · Answer

this is kinda hard for me because i get confused if i have to put a number outside.

jdoe0001 · Answer

hmmm well... what do you think the denominator factors to?

dannyrod2000 · Answer

yes

jdoe0001 · Answer

what pairs did you get?

dannyrod2000 · Answer

$$(x+8)(x-8)$$ i am not really sure if it is

anonymous · Answer

When +8 and -8 are multiplied by each other, what is the product? If he answers is not the same as the "c" in you denominator, then there is a mistake.

jdoe0001 · Answer

*cough*    hint *cough* $\large \begin{array}{cccllll}
x^2&-2x&-8\
&\uparrow &\uparrow \
&2-4&2\cdot -4
\end{array}$

dannyrod2000 · Answer

(2+4)(2-4)?

jdoe0001 · Answer

ahemm let's see (2+4)(2-4)  => 4-8+8-16 => 4-16 => $\bf -12 \ne x^2-2x-8$

jdoe0001 · Answer

http://www.youtube.com/watch?v=ZQ-NRsWhOGI <---

dannyrod2000 · Answer

sorry i wasn't able to see it @jdoe0001

dannyrod2000 · Answer

can you please give me the answer because i was just working on a question for an hour.

jdoe0001 · Answer

https://www.khanacademy.org/math/algebra/multiplying-factoring-expression/factoring-quadratic-expressions/v/factoring-quadratic-expressions?v=eF6zYNzlZKQ

jdoe0001 · Answer

well... the issue is, you need to brush up on your quadratic factoring.... us writing it down for you so you can transcribe it over.... is not really "help"

dannyrod2000 · Answer

can you please cause i have like 40 more pages to do  for my homework.

dannyrod2000 · Answer

$$(x+4)(x-2) $$ @jdoe0001