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Karena tidak dapat difaktorkan seperti biasa,
Gunakan,
a = Koefisien x^2 = 1
b = Koefisien x = -2
c = Koefisien x^0 (Konstanta) = -10
Kalo emang salah soal, sepertinya
x^2 - 3x - 10 yang mudah difaktorkan