Difference of Squares

Reference > Algebra: Sums and Differences of Squares and Cubes

Description

The Difference of Squares Rule states that:

\({a}^{2}-{b}^{2}=(a+b)(a-b)\)

Examples

\[{x}^{2}-4\]

Rewrite it in the form \({a}^{2}-{b}^{2}\), where \(a=x\) and \(b=2\).

\[{x}^{2}-{2}^{2}\]

Use Difference of Squares: \({a}^{2}-{b}^{2}=(a+b)(a-b)\).

\[(x+2)(x-2)\]

Done