0. Review of Algebra

In Exercises 65–74, factor by grouping to obtain the difference of two squares. x⁴ − x² − 2x − 1

In Exercises 69–78, factor each polynomial.x³ − 5 + 4x³y − 20y

Factor each polynomial. See Examples 5 and 6. y^2-x^2+12x-36

Factor each polynomial. See Examples 5 and 6. 9m^2-n^2-2n-1

In Exercises 69–80, factor completely.(x − y)⁴ − 4(x − y)²

In Exercises 65–74, factor by grouping to obtain the difference of two squares. z² − x² + 4xy − 4y²

In Exercises 69–78, factor each polynomial.2y⁷(3x−1)⁵ − 7y⁶(3x−1)⁴

Factor each polynomial. See Examples 5 and 6. 8-a^3

Factor each polynomial. See Examples 5 and 6. 27-r^3

In Exercises 69–82, factor completely.10y⁵ – 17y⁴ + 3y³

Factor each polynomial. See Examples 5 and 6. 125x^3-27

In Exercises 75–94, factor using the formula for the sum or difference of two cubes. x³ + 64

In Exercises 69–82, factor completely.12x² + 10xy – 8y²

In Exercises 69–80, factor completely.x³ − y³ − x + y