Question

Please help me with this homework equation

I don’t understand and need help someone please do step by step

Answer 1

Explanation:

f'(x) = 6x-12

in vertex : f'(x) = 0

6x-12 =0 => x=2

f(2) = 3 ( 2² ) -12 (2 ) +1 = -11

vertex ( 2 , -11 )