Using the difference of two squares to factor a binomial

The video tutorial explains how to factor the expression 49 - 121Y^2 by applying the difference of squares method. It begins by checking for common factors and then identifies the expression as a difference of squares. The tutorial demonstrates rewriting 49 as 7^2 and 121Y^2 as (11Y)^2, allowing the expression to be factored into (7 - 11Y)(7 + 11Y). The video concludes with a summary of the process.

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