Apakah bentuk nada y = 4x ^ 2 + 17x + 4?

Jawapan:

#y = 4 (x + 17/8) ^ 2 - 140.5 #

Penjelasan:

Pertama, cari koordinat x puncak:

#x = -b / (2a) = -17 / 8 #

Seterusnya, temui koordinat puncak vertex

#y (-17/8) = 4 (289/64) - 17 (17/8) + 4 = 1156/64 - 289/8 + 4 = = -1156/8 + 32/8 = - 1124/8 = -140.5 #

Borang Vertex:

#y = 4 (x + 17/8) ^ 2 - 140.5 #