What is the domain and range of the function
f(x)=x^2-2?
please teach me..!
as I mentioned in your previous post,
The domain of all polynomials is (-∞,∞)
Now, note that x^2 >= 0
so, x^2-2 >= -2
The range is thus [-2,∞)
Think of the graph. Its vertex is at (0,-2).