Answer:
F(x) = 7 --> -12
F(x) = 7th --> 16 + 21th - 7th^2
Step-by-step explanation:
F(x) = 7
16 + 3x - x^2
16 + 3(7) - 7^2
16 + 21 - 49
= -12
--------------------------------------------
F(x) = 7th
16 + 3x - x^2
16 + 3(7th) - 7th^2
= 16 + 21th - 7th^2
