# Multiplying Binomials

Using the Foil Method

Multiplying polynomials becomes a little trickier when you multiply
two binomials. We are still going to use the distributive property, but
many students refer to the acronym, FOIL in order to remember the steps
for multiplying binomials.

I am actually going to show you two ways to multiply binomials. The
first way is thinking of it as another way to use the distributive
property. The second way will be to use the FOIL Method. Let's take a
look at the following examples.

## Example 1: Using the Distributive Property

We will use the distributive property to multiply the following binomials:

(3x - 4)(2x +1)

Now, that seems like a lot of work doesn't it? That is the process
for multiplying binomials, but eventually you'll be able to complete
this process without writing out each step of the distributive property.
I wrote it out, in hopes that you will understand the process. You
will be able to do a lot of those steps mentally!

One way to help you remember the steps to perform mentally is to
remember the acronym, FOIL. If you compare each step in the first
example, to the steps used in example 2 with the foil method, you will
find that they are pretty much the same. Let's take a look!

FOIL stands for:

Let's see how we can use FOIL to multiply two binomials.

## Example 2: Using Foil

Let's take a look at the same problem demonstrated in Example 1 and see
how FOIL can help us to remember all the steps in multiplying binomials.

We will multiply the same two binomials:

(3x - 4)(2x +1)

As you can see, when using FOIL ,we first distributed the 3x
throughout the quantity (2x +1). Then we distributed the -4 throughout
the quantity (2x + 1). So, you can think of it as distributing one
binomial throughout the other or you can remember FOIL to perform the
same steps!

Let's look at another example using FOIL.

## Example 3: Using the FOIL Method

## TIP

There is one thing that you need to remember with FOIL! It only works when you are multiplying two binomials.

This is not the only method used when multiplying polynomials and it
doesn't work for all polynomials. It ONLY works with two binomials!

Are you ready to practice?

## Practice Problems

## Solutions

Problem 1:

Problem 2:

Great Job! In the next lesson, we will take a look at a few "special cases" when multiplying binomials!

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