Giải phương trình 1. 3(x – 2) + 15 = 5(2 – 3x) 2. 4x(x – 1) – (x + 3)(x – 3) = 9 3. (3x – 1)(4x + 3) + 2(3x – 1) = 0 4. (2x – 1)2 = (8x + 3)(2x – 1) 5. (x + 2)(4 – x) = x2 + 4x + 4 6. x2 – x – 12 = 0 7. 4x2 – 12x + 5 = 0

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