Question

factor 4x^2-4 completely

Answer 1

(2x)^2-2^2

Answer 2

@aJ01 wrote your expression like that to hint to you what you need to factor.

Answer 3

that still does not make sense to me

Answer 4

Ever heard about the difference of square?

Answer 5

hint: if a = 2x and b = 2
(a + b)(a - b) = a^2 + b^2

Answer 6

4(x^2-1)
4(x^2-1^2) since 1^2=1
4(x-1)(x+1)