Final answer:
The value of f(2) is 10.
Step-by-step explanation:
If f is a one-to-one function with f(x) = x² + 3x, we can find the value of f(2) by substituting 2 into the function.
f(2) = (2)² + 3(2) = 4 + 6 = 10.
Therefore, the value of f(2) is 10.