Question 1189921
The vertex is where x=-b/2a
this is -2/-2 or +1 for x
when x=1, f(1)=-2
(1, -2)
-
vertex form
-(x^2-2x+3)
complete the square
-(x^2+2x+1)-3+1, the first 1 is negative and the second is positive
-(x-1)^2-2
this is vertex form
the vertex is (1, -2), or (-h, k)
{{{graph(300,300,-10,10,-10,10,-x^2+2x-3)}}}