Question

How do you simplify y^2-9/3+9y? Thanks :)

Answer 1

What? How do you get -y?

Answer 2

Yes. I want to understand it. I get a different answer...

Answer 3

Is it supposed to be 3y+9?

Answer 4

The original problem

Answer 5

\[y^2-9=(y+3)(y-3)\]\[3y+9=3(y+3)\]
The y+3 will cancel out, so you get \[(y-3)/3\]

Answer 6

but the problem says 3+9y.. :/

Answer 7

Hmm...that's not going to simplify nicely.

Answer 8

-y won't be correct

Answer 9

Yeah its going to be hard. I dont know what to do..

Answer 10

It can't be simplified in any meaningful way. Are you sure the problem is written correctly?

Answer 11

I got it in my college algebra book so it should be correct? Unless its one of those trick questions.

Answer 12

Probably...jerks. Is it supposed to be simplified by synthetic division?

Answer 13

No. It just says simplify the following rational expressions. :/

Answer 14

Ah, in that case, it's simplified already.

Answer 15

But cant you simplify the denominator into 3(1+3y)??

Answer 16

sure

Answer 17

You can do that, but it's not really any simpler.

Answer 18

what are you gonna do with that ?

Answer 19

Oh ok. Well thank you!! :D

Answer 20

Thats what I was thinking.. Is it?

Answer 21

a-b looks good to me.

Answer 22

You have to assume that a is larger than or equal to b