F(x) = -x^2-12 find f(-3)

Step-by-step explanation:

We are given the function:

We want to find f(-3), so we must substitute -3 in for x.

Solve according to PEMDAS: Parentheses, Exponents, Multiplication, Addition, Subtraction.

Solve the exponent.

Distribute the -1 in.

Subtract.

For the function -x²-12, f(-3) is equal to 21

since we know that the two functions are equal, f (x) = g

(x), therefore when we equate the two equations the result should be similar to

3x = x – 4:

a. f(x) = 3x, g(x) = x – 4

equating the two functions:

3x = x – 4             (correct)

so we now got our answer (a)