Question

:)???

Answer 1

Which one should I help you with?

Answer 2

first coordinate of the vertex is always \(-\frac{b}{2a}\)
second coordinate is what you get when you replace \(x\) by that number
in your case
\[ax^2+bx+c=-x^2+12x-4\] so \(a=-1,b=12\) and \(-\frac{b}{2a}=-\frac{12}{-2}=6\)