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Difference of Squares
(KS4, Year 10)
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).
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:- Do you disagree with something on this page?
- Did you spot a typo?