Question

Determine which polynomial is a difference of two squares.

b2 − 14

b2 + 14

b2 − 49

b2 + 49

Answer 1

b^2 is a square but 14 is not a square so it's not A
b^2 + 14 is not a difference
b^2 + 49 <---both are squares but it's not a difference

therefore you're left with only one choice ;)