Question

Which of the following represents a difference of squares binomial?

A) (k - 2)2
B) (k2 + 4)(k2 + 4)
C) k4 - 2
D) k4 - 16

Answer 1

Difference of squares means each term must be a perfect square. Example: a^2 - b^2.
See which choice can be rewritten as difference of two squares.

Answer 2

i want to say either B or D....

Answer 3

If B were (k2 + 4)(k2 - 4) (minus instead of plus) then it can be written as a difference of two squares. But (k2 + 4)(k2 + 4) = (k2+4)^2.

But D) is k^4 - 16 = (k^2)^2 - 4^2 which is a difference of two squares.

Answer 4

ohhhh okok i get it

Answer 5

Alright.