Question

(y+1/3) (y-1/3)

Answer 1

You start by FOIL-ing this

Answer 2

Do you know how to use FOIL?

Answer 3

No I'm sorry, I don't can you explain

Answer 4

FOIL is an acronym

Answer 5

First Outer Inner Last

Answer 6

So you begin by multiplying the first ones

Answer 7

y and y= y^2

Answer 8

Does that part make sense?

Answer 9

yes I see because first would be the 2 y's

Answer 10

Yep so next is Inner

Answer 11

When you look at the two factors, you see how +1/3 and y are in the inside?

Answer 12

Yes I see so Would that be y/3?

Answer 13

Yes!

Answer 14

Next is Outer, so y and -1/3 so -y/3

Answer 15

Ok so do I have a new equation to do or is my answer y/3 - y/3?

Answer 16

alternatively, use the difference squre formula :
(a-b)(a+b) = a^2 - b^2

(y+1/3) (y-1/3) = y^2 - (1/3)^2 = ...

Answer 17

Nope, sorry about that

Answer 18

We are still missing the last one which is Last

Answer 19

So 1/3 x (-1/3) = -1/9

Answer 20

(1/3)^2 = 1/3 * 1/3 = 1/9

Answer 21

all together you get y^2-1/9

Answer 22

Because it's y^2+1/3y-1/3y-1/9

Answer 23

Thank you so much!! I think I understand this now!

Answer 24

Awesome! No problem!