a) -2x - 11 chia hết cho 3x + 2 b) Chứng minh giá trị biểu thức ko phụ thuộc vào a : ( 3a + 2 ) . ( 2a - 1 ) + ( 3-a ) . ( 6a - 2 - 17) . ( a - 1 ) giúp tuôi với, hứa sẽ đền đáp đầy đủ nhé

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