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thaocamuoihdc
2 năm trước
Bài 5.(0,5 điểm) Cho đa thức f(x) = $x^{2}$ +mx + 2 a) Xác định m để f(x) nhận -2 làm một nghiệm. b) Tìm tập hợp các nghiệm của f(x) ứng với giá trị vừa tìm được của m
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