Final answer:
To evaluate the function f(x) = x²−2 at the given values, substitute the values into the function and simplify.
Step-by-step explanation:
To evaluate the function f(x) = x²−2 at the given values, we substitute the values into the function and simplify.
f(-3) = (-3)² - 2 = 9 - 2 = 7
f(3) = (3)² - 2 = 9 - 2 = 7
f(0) = (0)² - 2 = 0 - 2 = -2
f(21) = (21)² - 2 = 441 - 2 = 439
Therefore, f(-3) = 7, f(3) = 7, f(0) = -2, and f(21) = 439.