Nilai maksimum fungsi y=-x2+5x-6

Kelas 10 Matematika
Bab Persamaan dan Fungsi Kuadrat

y = -x² + 5x - 6
     a = -1; b = 5; c = -6

sumbu simetri
= -b/2a
= -5/(2 . (-1))
= 5/2

y = - (5/2)² + 5 . (5/2) - 6
y = -25/4 + 25/2 - 6
y = -25/4 + 50/4 - 24/4
y = 1/4

Nilai maksimum = 1/4