Answer:
f(-3) = 0
Explanation:
The question is asking you to evaluate the function when x = -3. Therefore, substitute -3 in for x and simplify.
f(x) = x² + 7x + 12 <---- Original equation
f(-3) = (-3)² + 7(-3) + 12 <---- Substitute -3 for x
f(-3) = 9 + 7(-3) + 12 <---- Square -3
f(-3) = 9 - 21 + 12 <---- Multiply 7 x -3
f(-3) = 0 <---- Combine terms