Question

Please help :)
Which binomial is a difference of squares?

Answer 1

a 14x^2 – 81

b 16x^2 – 81

c 25x^2 + 81

d 36x^3 – 81

Answer 2

Just as the name implies... it has to be a *difference* (means a minus sign) and both terms have to be perfect squares ^^

Answer 3

so its c right?

Answer 4

Does the sign in c even LOOK like a minus sign? :P

Answer 5

It's a plus sign, LOL
So no.

Answer 6

d