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y=a(x-x1)(x-x2)
delta=25-24=1
pierw. z delta=1
x1=(5-1)/2=2
x2=(5+1)/2=3
odp.
y=(x-2)(x-3)
x1=-b-delta/2a
x1=5-1/2=2
x2=5+1/2=3
y=a(x-x1)(x-x2)
y=(x-2)(x-3)