Question

vertex of parabola y=3x^2 + 6x -1

Answer 1

Put it in your graphing calculator? :D

Answer 2

do you know differentiation?

Answer 3

If you have a parabola in the form \[y = ax^2+bx+c\] you can find the x-coordinate of the vertex via \[x = -\frac{b}{2a}\]To find the y-coordinate, just plug the x-coordinate into the formula and see what comes out.

Answer 4

Indeed :D