Antwoord: Vertex-formulier is # Y = (x + 7/2) ^ 2-57 / 4 # en vertex is #(-3 1/2,-14 1/4)# Uitleg: # Y = x ^ 2 + 7x-2 # = # X ^ 2 + 2 x 7/2 x x + (7/2) ^ 2- (7/2) ^ 2-2 # = # (X + 7/2) ^ 2-49 / 4-2 # = # (X + 7/2) ^ 2-57 / 4 # Vandaar dat vertex-vorm is # Y = (x + 7/2) ^ 2-57 / 4 # en vertex is #(-7/2,-57/4)# of #(-3 1/2,-14 1/4)#
