Bài 3 tìm x a , 2x^ 3 ( 2x - 3 ) - x ^ 2 ( 4x ^ 2 - 6 + 2 ) = 0 b , 2x ( x - 5 ) - x ( 3 + 2x) = 0 c, ( x - 1 ) ^ 2 - 2( 3 + x^2 ) - x^2 = 0 d, ( 3x - 1 ) ( 2 + x ) = 3 ( x^2 - 2 )
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