Given:

f of x equals x squared minus 6 x plus 13



What is f of 4 ?

To find f(4), we substitute 4 for x in the given equation f(x) = x^2 - 6x + 13.

f(4) = (4)^2 - 6(4) + 13
= 16 - 24 + 13
= 5

Therefore, f(4) equals 5.