Answer:

Step-by-step explanation:
So we have the expression:

Distribute the negative:

Combine like terms:

And we're done!
A
x=y^2-9
x+9=y^2
square root both sides
+-sqrt(x+9)
Answer B
I could be wrong
Explanation
9514 1404 393
Answer:
f(g(x)) = -3x^2 -2x -3
Step-by-step explanation:
<u>Given</u>:
f(x) = -x-7
g(x) = 3x^2 +2x -4
<u>Find</u>:
f(g(x))
<u>Solution</u>:
Substitute per the function definitions.
f(g(x)) = f(3x^2 +2x -4) = -(3x^2 +2x -4) -7
f(g(x)) = -3x^2 -2x -3