Jawapan: Cari bentuk puncak #y = x ^ 2 - 9x + 2 # Ans: #y = (x - 9/2) ^ 2 - 73/4 # Penjelasan: Vertex # (x, y) #. # x #-kawasan puncak: #x = (-b / (2a)) = 9/2 # # y #-kawasan puncak: #y = y (9/2) = (9/2) ^ 2 - 9 (9/2) + 2 = # #= 81/4 - 81/2 + 2 = -81/4 + 2 = -73/4# Borang Vertex -> #y = (x - 9/2) ^ 2 - 73/4 #
