Which expression represents the side length of a square with area x2+4x+4x^2 + 4x + 4x2+4x+4?
(x+2)2(x+2)^2(x+2)2
x+4x+4x+4
x2+4\sqrt{x^2+4}x2+4
∣x+2∣|x+2|∣x+2∣