Sagot: Vertex# -> (x, y) -> (- 2,11) # Axis of symmetry # -> x _ ("vertex") = -2 # Paliwanag: Standard form # y = ax ^ 2 + bx + c # Isulat bilang # y = a (x ^ 2 + b / palakol) + c # #x _ ("vertex") = (-1/2) xx b / a # Kaya para sa iyong katanungan #x _ ("vertex") = (- 1/2) xx ((- 8) / (- 2)) = -2 # Pagpapalit # x = -2 # nagbibigay #y _ ("vertex") = - 2 (-2) ^ 2-8 (-2) +3 = -8 + 16 + 3 = 11 #