Answer:
f(-3) = 4
Step-by-step explanation:
f(x) = x² - 5
f(x) is a function with input x, meaning it is an expression which has terms involving x;
x is a variable and can be considered a space holder;
f(-3) is the function with input -3, this simply means replacing the space holder, i.e. x, with -3;
f(-3) = (-3)² - 5
f(-3) = 9 - 5
f(-3) = 4
