algebra

Could someone please help.
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

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  1. just replace any x with -1, then simplify:

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

    you are correct

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