L24 Math 132 Lecture 21: Lecture 21

What is the completely factored form of d^4 - 8d^2 + 16?.

A) (d^2 + 4)(d^2 - 4).

B) (d^2 - 4)(d^2 - 4).

C) (d^2 + 4)(d + 2)(d - 2).

D) (d + 2)(d - 2)(d + 2)(d - 2)