Difference of Squares

Let's start with a test!

The Test

Here is a -question, multi-choice test for the "Difference of Squares" lesson. The pass mark is 90%. Don't worry! All the information you need to pass is in the lesson section under the test.

The Lesson

A difference of squares is square number (a number multiplied by itself) subtracted from another square number.

A Real Example of a Difference of Squares

It is easier to understand a difference of squares with an example. In this example,

• 3² = 3 × 3 = 9 (3 squared).
• 2² = 2 × 2 = 4 (2 squared).

The two numbers are square numbers. They are squares. Two numbers are being subtracted from each other. It is a difference of squares.

A Difference of Squares in General

In general, we can use symbols instead of numbers: a and b are both integers (whole numbers).

How to Factor a Difference of Squares

A difference of squares can be factored into two brackets:

You might also like...