Question

Let f(x) = x² + 7x + 12.
2
Evaluate: f(-3) =

Answer 1

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