If f(x)=x2−4x+3f(x) = x^2 - 4x + 3f(x)=x2−4x+3, what is the range of f(x)f(x)f(x)?
[−4,∞)[-4, \infty)[−4,∞)
[3,∞)[3, \infty)[3,∞)
[0,∞)[0, \infty)[0,∞)
[−1,∞)[-1, \infty)[−1,∞)