Bài 1: Xác định hệ số a, b của phương trình bậc nhất một ẩn sau: 3x + 2 = 0 b) 3 – 2x = 0 c) x + 5 = 0 d) 5 – x = 0 Bài 2: Giải các phương trình sau: 5x – 15 = 0 b) 3x – 2 = 2x – 3 c) 7 + 2x = 22 – 3x d) x – 12 + 4x = 25 + 2x -1 e)2(x+3) = 2(x-4) + 14 f)12x + 5(4x-4) = 15-(5x-18) Bài 3: Giải các phương trình sau: (3x-2)(8+4x) = 0 b) 2x(x-3) + 5(x-3) = 0 c) 4x2 – 1 = 2x+1 d) x2 – 9 = x2 + 6x +9 e) 3x (x-5) = 2x2 - 3x f) 3x(2x-3) - 4x+6 =0 m.n chỉ e vs

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