Grafik fungsi kuadrat Y=3-2x-x pangkat 2

titik potong sumbu x:
[tex]3 - 2x - {x}^{2} = 0 \\ {x}^{2} + 2x - 3 = 0 \\ (x + 3)(x - 1) = 0 \\ x = - 3 \\ x = 1[/tex]
titik potong sumbu y :
y = 3 (0, 3)

puncak :
x = -1
y = 4+12/4 = 4