Question

Please help.

Answer 1

hold on lemme upload it

Answer 2

?

Answer 3

@snowflake0531

Answer 4

ahh*

Answer 5

It's the last one right?

Answer 6

Without giving a direct answer, the easiest way to learn which one this is, is to expand each of them.

Answer 7

- . -

Answer 8

So, I suggest to first expand the first one,
(a-b)(a+b), to see whether or not it equals a^2 + b^2

Answer 9

I suggest using the FOIL method

Answer 10

@Karlieeeeeee
You can factor out the first one
(a+b)(a-b), using the FOIL method, forward, outside, inside, last
Then, you an see whether or not it equals the other side of the equal sign