Final answer:
The function f(x) = x³ + 2x² - 3 is a polynomial function that can be evaluated by substituting a specific value of x into the function.
Step-by-step explanation:
The function f(x) = x³ + 2x² - 3 is a polynomial function. It represents a curve on a graph. To find the value of the function at a specific value of x, you simply substitute that value into the function. For example, if x = 3, you would substitute 3 into the function to get f(3) = 3³ + 2(3)² - 3 = 27 + 18 - 3 = 42.