Question

Evaluate the function. f(x) = -4x^2+9Find f(-3)

Answer 1

Answer:

-27

Step-by-step explanation:

1. f(x) = -4x² + 9
2. f(-3) = -4(-3)² + 9
3. f(-3) = -4(9) + 9
4. f(-3) = -36 + 9
5. f(-3) = -27

Answer 2

Answer:

$f(-3)=-27$

Step-by-step explanation:

So we have the function:

$f(x)=-4x^2+9$

And we want to find f(-3).

So, let's substitute -3 for x. Therefore:

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

Square:

$f(-3)=-4(9)+9$

Multiply:

$f(-3)=-36+9$

Add:

$f(-3)=-27$

And we're done!