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a = 2, b = -6 dan c = 2m – 1
α + β = -b/a = 6/a
α = 2β → substitusikan
2β + β = 6/(2β)
3β = 6/(2β)
6β² = 6
β = 1, substitusikan lgi
α = 2β = 2(1) = 2
αβ = c/a = (2m – 1)/2
2(1) = (2m – 1)/2
4 = 2m – 1
m = 5/2