Question 1093316
vertex x point is at -b/2a, where b is -2 and a is -1 (writing function as ax^2+bx+c.
x=-(-2)/-1*2=-1
when x=-1, y=-1+2-8=-7
at (-1, -7)
{{{graph(300,300,-5,5,-10,10,-x^2-2x-8)}}}