Question 269113
<pre><font size = 4 color = "indigo"><b>
The vertex of the parabola whose equation is the quadratic function

{{{"f(x)"=ax^2+bx+c}}}

is the point ({{{-b/(2a)}}}, f({{{-b/(2a)}}}))

and the axis of symmetry has the equation

{{{x=-b/(2a)}}}.  The vertex point is ON the axis of symmetry.

Edwin</pre>