## 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,-
3
^{2}= 3 × 3 = 9 (3 squared). -
2
^{2}= 2 × 2 = 4 (2 squared).

*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).