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(x-2)(x-1) = 0
x-2 = 0
x = 2
α = 2
atau
x-1 = 0
x = 1
β = 1
α1 = (α + 1) = 3
β1 = (β+1) = 2
(x-3)(x-2)=0
x²-3x-2x+6 = 0
x²-5x+6=0
jawabanya adalah D