Antwoord:
# Y = (x - (- 02/09)) ^ 2 + (- 169/4) #
Uitleg:
Algemene vertex-vorm:
#color (wit) ("XXX") y = (x-a) ^ 2 + b # met vertex op # (A, b) #
#rarrcolor (wit) ("XXX") y = x ^ 2 + 9x-22 #
#rarrcolor (wit) ("XXX") y = x ^ 2 + 9xcolor (rood) (+ (9/2) ^ 2) -22color (rood) (- (9/2) ^ 2) #
#rarrcolor (wit) ("XXX") y = (x + 9/2) ^ 2-22-81 / 4 #
#rarrcolor (wit) ("XXX") y = (x - (- 02/09)) ^ 2 + (- 169/4) #
dat is de vertex-vorm met vertex op #(-9/2,-169/4)#
