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2023-03-30 20:22:09
Ta có : a-b+c=0
⇔ 1 - (-5) + (-6) =0
⇒ phương trình có 2 nghiệm phân biệt :
x1 = 6 x2 = -1
Vậy phương trình có tập nghiệm S={6 ; -1}