Example Question - substitute x

Finding the value of a function at a specific point

To find the value of f(5), we simply substitute x with 5 in the given function f(x) = -x^2 + 6x - 4. f(5) = -(5)^2 + 6(5) - 4 = -25 + 30 - 4 = 5 - 4 = 1 Thus, f(5) equals 1.