Antwoord:
Vertex is # (-0.2, 9.2)# en vertex-vorm van vergelijking is # f (x) = -5 (x + 0.2) ^ 2 + 9.2 #
Uitleg:
#f (x) = -5x ^ 2-2x + 9 of f (x) = -5 (x ^ 2 + 0.4x) + 9 # of
# f (x) = -5 (x ^ 2 + 0.4x + (0.2) ^ 2) + 5 * 0.04 + 9 # of
# f (x) = -5 (x + 0.2) ^ 2 + 9.2 #. Vertex is # (-0.2, 9.2)# en
vertex vorm van vergelijking is # f (x) = -5 (x + 0.2) ^ 2 + 9.2 # Ans
