1/
f(x)=a(x-p)^2+q
Δ=196-160=36
p=-b/2a
p=14/4=7/2
q=-Δ/4a
q=-36/8=18/4=9/2
f(x)=2(x-7/2)+9/2
2/
f(x)=a(x-x1)(x-x2)
Δ=196-160=36
√Δ=√36=6
x1=(-b+√Δ)/2a
x1=(14+6)/4=5
x2=(-b-√Δ)/2a
x2=(14-6)/4=2
f(x)=a(x-5)(x-2)
3/
x | 0 | 1 | 2 | 3 | 4 |
----------------------------
y |20| 8 | 0 | -4 | -4 |
yMAX= 20
yMIN= -4
