Gambar grafik fungsi f(x)=x2-4x+5

jawab

y = x² - 4x + 5

titk pot dgnsmbu y, x = 0 , y = 5 ..A (0,5)
sumbu simetri x = -b/2a = 4/2= 2
titik puncak x= 2 , y  = 4 - 8 + 5 --> y = 1
P(2,1)