Question

Evaluate f(-7) for the function
f(x) = x² + 3x - 12

Answer 1

f(- 7) = 16

Explanation:

substitute x = - 7 into f(x) , that is

f(- 7) = (- 7)² + 3(- 7) - 12 = 49 - 21 - 12 = 28 - 12 = 16