Carefully examine what each letter stands for.However, do not focus on remembering since I will show below that it is important to master multiplication of binomials.

The letter F stands for first

The letter O stands for Outer

The letter I stands for inner

The letter L stands for last

I will illustrate with an example.Let's say that you want to multiply (x + 2) and (x + 3)

(x + 2) * (x + 3)

O:Multiplying the outer term of each binomial, we get x * 3 = 3x

I:Multiplying the inner term of each binomial, we get 2 * x = 2x

L: Multiplying the last term of each binomial, we get 2 * 3 = 6

Combining everything, we get x

Sounds easy, right?

Unfortunately, my 3 years of experience in teaching has shown me that using the acronym FOIL makes multipling binomials a lot harder.

Students tend to focus more on remembering positions of terms and their respective names as opposed to understanding a very simple technique

And it can be very confusing!

For instance, the position used for first is also used for outer and the one used for outer is also used for last.

The brain does need all that extravagance

Furthermore, when you get a problem like 2 * ( x + y) or (x + y) * (x + 2 + z), you wonder why FOIL was invented in the first place

When multiplying binomials, I suggest you forget about the abbreviation FOIL and just do the problem naturally as I am going to explain.

Look at the following illustration:

We get x

Then, multiply the second term in the first binomial by each term in the second binomial

We get 2x + 6

(x + -2) * ( 1 + x)

First, do:

x * 1 = x and

x * x = x

Then,do

-2 * 1 = -2

-2 * x = -2x

Putting it all together, we get:

x + x

(4x + 2) * (x + 1)

First, do:

4x * x = 4x

4x * 1 = 4x

Second, do:

2 * x = 2x and

2 * 1 = 2

Putting it all together, we get:

4x

Beyond FOIL:

2 * (x + y) = 2x + 2y

(x + y) * (x + 2 + z)

First, do:

x * x = x

x * 2 = 2x

x * z = xz

Then, do:

y * x = yx

y * 2 = 2y

y * z = yz

Putting it all together, we get:

x

Multiplying binomials should not be hard if you follow what I taught you here.