Respuesta :

sarahwink
vertex = -b/2a

Therefore, you must change each of these eachs in the form of a+b+c. Take the coefficient to find the vertex.

1. x^2+6x+11 —> -6/2(1) = -3
2. x^2+8x+34 —> -8/2(1) = -4
3. x^2+4x+7 —> -4/2(1) = -2