Question 884910
Select the x-coordinate of the vertex of the parabola defined by the function f(x)=-9x^2+7x+8
<pre>
x-coordinate of the vertex is: {{{h = - b/2a}}}, with: a being - 9, and b being 7
{{{h = - b/2a}}} becomes {{{h = - 7/(2(- 9))}}}
x-coordinate of vertex: {{{highlight_green(highlight_green(h = 7/18))}}}