Final answer:
To find f(-1) in the given quadratic function, substitute -1 in place of x and evaluate.
Step-by-step explanation:
To find f(-1) when f(x) = x² – 5, we substitute -1 in place of x in the function.
So, f(-1) = (-1)² - 5 = 1 - 5 = -4.
Therefore, f(-1) = -4.
Learn more about Evaluating a quadratic function at a specific value