Question

I took a test and one of the questions were

f(x) = 63
the equation given was 3x^2-12
i remember 3 of the answer choices were
-(plus minus sign) radical, and 17 was in it)
-(plus minus sign) 5
- 11,895
at first i got 11,895 but then i tried a different way and got the 5, but my friend in front of me got the 17 one??

Answer 1

I plugged in 63 for x in the equation and I got 11,895.

Explanation:

But how did y'all get 17 & 5?