If f(x)=x2+4x+4f(x) = x^2 + 4x + 4f(x)=x2+4x+4, find the range of f(x)f(x)f(x).
[0,∞)[0, \infty)[0,∞)
[4,∞)[4, \infty)[4,∞)
[−4,∞)[-4, \infty)[−4,∞)
All real numbers