Question

What polynomial identity should be used to prove that 252 = (20 + 5)2?

Answer 1

@Hero

Answer 2

@mathmate

Answer 3

If I had to pick one, I'd say Square of Binomial. Binomial means two terms. You have two terms. Then you're squaring them

Answer 4

I'm assuming you meant

\[(20+5)^{2} = 25^{2}\]

If so, the answer is none of them. All you are using is the fact that 20+5 =25

Answer 5

I come to the same conclusion as @DecentNabeel

Answer 6

@BrookieCooking566

Answer 7

thanks @Hero