Final answer:
After substituting -3 into the function f(x) = x^2 + x and performing the calculations, f(-3) is determined to be 6.
Step-by-step explanation:
To find f(-3) for the function f(x) = x^2 + x , substitute x = -3 into the function:
f(-3) = (-3)^2 + (-3)
Simplifying the expression:
f(-3) = 9 - 3 = 6
Therefore, the correct answer is:
C. 6
So, f(-3) for the given function is 6. This result is obtained by plugging in x = -3 into the function and evaluating the expression.