How do you factor y4 - z4?

Answer 1

(y - z)(y + z)(y^2 + z^2)

Answer 2

The expression y^4 - z^4 can be factored using the difference of squares formula. It can be written as (y^2 + z^2)(y^2 - z^2), which can be further simplified to (y^2 + z^2)(y + z)(y - z).