WILL medal! Please help!

Question

anonymous · Answer

attachment

anonymous · Answer

Welcome To OpenStudy!! :) Oh no! Seems you have posted in the wrong section :O Not to worry >:) Here is the link to the English http://openstudy.com/study#/groups/English Good Luck! :)

anonymous · Answer

lol

loser66 · Answer

LOL

anonymous · Answer

oopes wrong post haha

anonymous · Answer

after that silliness, the domain of any polynomial, unless otherwise stated, is "all real numbers"

anonymous · Answer

So it would be the second option? @satellite73

thesmartone · Answer

correct

anonymous · Answer

@TheSmartOne 
@satellite73 

How would this be solved?

thesmartone · Answer

As satellite said, the domain will be all real numbers unless noted otherwise.

But for this question we have to take into consideration the denominator. Can you factor the denominator?

anonymous · Answer

(x−3)(x+3) right? @TheSmartOne

Thus it would be the second option?

thesmartone · Answer

correct,

now what would happen if the denominator of any fraction is equal to 0?

$\sf\Large\frac{1}{0}=?$

anonymous · Answer

It couldnt be divided so the numerator would be the same?

thesmartone · Answer

So the domain has to be all real numbers except for the values which make the denominator equal to 0

thesmartone · Answer

set each equal to 0 to find out

(x−3)=0
(x+3)=0

anonymous · Answer

Alright, I see.