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a=1 b=2 c=1
Δ=b²-4ac
Δ=4-4=0
p=-b/2a
p=-2/2=-1
q=-Δ/4a
q=0
y=1(x+1)²
b)f(x)= x2 + 2x +4
a=1 b=2 c=4
Δ=4-16=-12
p=-2/2=-1
q=12/4=3
y=1(x+1)²-3
c) f(x) = x2 +2x
a=1 b=2 c=0
Δ=4
p=-2/2=-1
q=-4/4=-1
y=1(x+1)²-1
d) f(x) = - x2 + 2x
a=-1 b=2 c=0
Δ=4
p=-2/-1=1
q=-4/-4=1
y=-1(x-1)²+1
e) f(x) = x2 - 6x +8
a=1 b=-6 c=8
Δ=36-32=4
p=6/2=3
q=-4/4=-1
y=1(x-3)²-1