# F.O.I.L

### Math

## FOIL

FOIL stands for

F.irst- Tells you to multiply the __first__ terms of each binomial.

O.uter- Tells you to multiply the __outer__ terms of each binomial.

I.nner- Tells you to multiply the __inner__ terms of each binomial.

L.ast- Tells you to multiply the __last__ terms of each binomial.

## Example Problem

( y + 3 ) ( y + 7 )

F.irst- y2

y2

( y + 3 ) ( y + 7 )

y2 + 7y

( y + 3 ) ( y + 7 )

I.nner-3y

y2 + 7y + 3y

( y + 3 ) ( y + 7 )

L.ast- 21

y2 + 10y + 21

## Combine like terms

y2, 7y, 3y, 21

y2, 10y, 21 = y2 + 10y + 21

## Answer

y2 + 10y + 21