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.

What is the first step in attempting to factor the expression 49 - 121Y^2?

• Check for a greatest common factor (GCF)

• Apply the quadratic formula

• Use the sum of cubes formula

• Rewrite the expression as a trinomial

Which of the following is a perfect square?

• 50

• 47

• 49

• 48

How can 121Y^2 be expressed as a perfect square?

• (13Y)^2

• (11Y)^2

• (12Y)^2

• (10Y)^2

What formula is used to factor the expression 49 - 121Y^2?

• Sum of two squares

• Difference of two squares

• Difference of cubes

• Sum of cubes

What is the factored form of 49 - 121Y^2?

• (7 - 11Y)(7 - 11Y)

• (7 + 11Y)(7 + 11Y)

• (7 - 11Y)(7 + 12Y)

• (7 + 11Y)(7 - 11Y)