Find the range y = log2 (square of X + 4x + 5)

Find the range y = log2 (square of X + 4x + 5)

Let f (x) = x & sup2; + 4x + 5, the domain of y = log2 (X & sup2; + 4x + 5) is [1, + ∞)
According to the logarithmic function image,
Then y = log2 (X & sup2; + 4x + 5) is [0, + ∞)