Subtracting Polynomials

Subtracting Polynomials is very similar to adding polynomials! In fact, we will be changing the subtraction problem to an addition problem!

In the Pre-Algebra section of the website, we started out by reviewing integers.

We said, "When you subtract integers, you must add the opposite! We also talked about the Keep - Change- Change Rule! That rule applies to polynomials as well!

Take a look at these examples that show you how to rewrite the problem as an addition problem.

Your first step is to change the subtraction problem to an addition problem. Then you add, just as you did in the adding polynomials lesson!

Let's take a look at an example! Once we change this problem to an addition problem, we will use the horizontal method for solving!

Example 1

For our next example, I am going to add a set of brackets, which will require a few more steps in order to reach a solution! Watch carefully!

Example 2

One last example! This example will demonstrate how to use the vertical method.

Example 3

Now you can successfully add and subtract polynomials! Ready to try a few on your own?

Practice Problems

Answer Key

Problem 1

Problem 2

Awesome Job! Now you are ready to multiply polynomials!