Question

Simplify: (2x + 8)(2x - 8).
A. 4x2 - 16
B. 4x2 - 64
C. 4x2 - 16x - 64
D. 4x2 - 8x + 16
I think its C.

Answer 1

Or A

Answer 2

Hint: (a+b)(a-b) = a^2 - b^2

Answer 3

So C . correct ?

Answer 4

2nd Hint: (2x+8)(2x-8) = (2x)^2 - (8)^2

Answer 5

D

Answer 6

3rd Hint: (2x)^2 - (8)^2 = (2*2*x*x) - (8*8)