Question

Choose the correct product of (6x − 2)(6x + 2).

36x2 + 4

36x2 − 24x + 4

36x2 + 24x + 4

36x2 − 4

Answer 1

you need to open the parenthesis 6x*6x+6x*2-2*6x-2*2=36x^2-4
so it's the fourth answer

Answer 2

but you can also use a simple formula:
(a+b)(a-b)=a^2-b^2