Bài 2:Tìm x a) (2x + 3)(2x - 6) - (2x - 1)^2=0 b) (2x - 1)^2=16 c) (3x - 2)(4x + 9) - 2x(6x + 1)=5 d) x^2 - 4=3x(x - 2) e) (2x + 3)^2 - (2x + 1)(2x - 1)=5 g) 3x(x - 2021) - x + 2021=0

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