Question

Which of the following represents a difference of squares binomial?

(k – 2)2

(k2 + 4)(k2 + 4)

k4 – 2

k4 – 16

Answer 1

A difference of squares would be something like (x+2)(x-2). So k^4 - 16 is (k^2-4)(k^2+4). Answer is D.

Answer 2

it is the last option!