Could someone please help.

Question

Consider the function 3x^2-7.
Find f(-2).
a) -1
b) 5
c) -5
d) 0

I think its a) -1 but not sure.

Thank you for your help

Answer 1

just replace any x with -1, then simplify:

3(-1)^2-7
3*1-7
6-7
-1

you are correct