Difference of squares intro (video) | Khan Academy
https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:quadratics-multiplying-factoring/x2f8bb11595b61c86:factor-difference-squares/v/difference-of-squares-intro
WEBAbout. Transcript. When an expression can be viewed as the difference of two perfect squares, i.e. a²-b², then we can factor it as (a+b) (a-b). For example, x²-25 can be factored as (x+5) (x-5). This method is based on the pattern (a+b) (a-b)=a²-b², which can be verified by expanding the parentheses in (a+b) (a-b). Questions. Tips & Thanks.
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