Final answer:
To calculate f(4) for the given function f(x) = x^2 - 5x + 6, we plug 4 into the equation and simplify to get 16 - 20 + 6, which results in 2.
Step-by-step explanation:
To find the value of f(4) for the function f(x) = x2 - 5x + 6, we need simply to substitute the value of 4 into the function for x and calculate the result.
So, f(4) = (4)2 - 5(4) + 6
= 16 - 20 + 6
= 2
Therefore, the value of f(4) is 2, which corresponds to option B.