Select the x-coordinate of the vertex of the parabola defined by the function f(x)=5x^2+3x+1
rewrite f(x) as
5(x + 3/10)^2 + 11/20
and then you can just read off the coordinates of the vertex.
5(x + 3/10)^2 + 11/20
and then you can just read off the coordinates of the vertex.