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Δ = 64 + 56
Δ = 120
p = -8/4 = -2
q = -120/8 = -15
f(x) = 2(x+2)^2 - 15
b)
Δ = 1
p = 1/2
q = -1/4
f(x) = (x-1/2)^2 -1/4
c)
Δ = 36
p = -6/-4 = 3/2
q = -36/-8 = 9/2
f(x) = -2(x - 3/2) + 9/2
d)
Δ = 96
p = 0
q = 96/12 = 8
f(x) = 3p^2 + 8