which is NOT a factor of 2x^2-32 ?
A) x^2-32 B) 2 C) x-4 D) x^2-16
PLEASE HELP ME

Question

which is NOT a factor of 2x^2-32 ?
A) x^2-32  B) 2  C) x-4  D) x^2-16
PLEASE HELP ME

debbieg · Answer

If you fully factor the expression, it will be easier for you to see what is/is not a factor.

First you have a GCF that you can pull out, so always start there.

What you will be left with is a difference of squares... do you know how to factor that?

debbieg · Answer

Or, you can just look to see which of the choices is clearly NOT a factor, because you can't multiply it by anything to get back the expression $2x^2-32$

anonymous · Answer

ok hold on im going to try it

debbieg · Answer

(that is, one of them is obviously NOT a factor, but I still think it's a good opportunity for you to factor the whole thing and then you can also see that the other 2 ARE clearly factors. :)

anonymous · Answer

is the answer 2 ?

debbieg · Answer

The answer? you mean the GCF?

anonymous · Answer

yea

debbieg · Answer

Oh, sorry.... i missed that "2" in the answer choices... lol. Well... if 2 is not a factor, then there is NOTHING that I can multiply 2 by and get back to the original expression.

$2\cdot?=2x^2-32$

Is that true??

anonymous · Answer

oh wait, would it be x^2-32 ?

debbieg · Answer

right! because for all of the others, you can multiply them by something and get back the original expression! :)

anonymous · Answer

yay, I understand it now

anonymous · Answer

i need help with another question

debbieg · Answer

You should post it as a new question. :) best way to get help is to post questions separately. I'll be on and off the site as I'm working on some other things, but if I can't respond, I'm sure someone will! :)

anonymous · Answer

alright thanks!