Question

Evaluate the quadratic function, f(x) = 3x2
– 4x – 9 at x = -2

Answer 1

11

Explanation:

f(x) = 3x^2 – 4x – 9

Let x = -2

f(-2) = 3 (-2)^2 -4(-2) -9

=3(4) +8 -9

=12 +8 -9

20-9

11