How do you find the domain and range of #f(y)=(y-2)^2-4 # ?
The range is (-∞,∞). The domain is (-∞,∞).
The range in this equation is all possible values for f(y), that do not give an imaginary result. Since no f(y) values give an imaginary result, it can be anything --> (-∞,∞).
The domain in this equation is all values of y that do not give imaginary results. Since no y values can give imaginary results, the domain is anything --> (-∞,∞).