1) a)(x ³-2x ²+3xy ²):(-2x) b)(6x ³-7x ²-x+2):(2x+1) c)(x ²-3x+xy-3y):(x+y) 2) a)x ²-y ²-4x+4 b)x ²-x-2020.2021 3) 2x ²+x+a+1 chia hết x-3 4) 2n ²-n+2 chia hết cho 2n+1 Các bạn làm giúp bài mình nhé.Mình cảm ơn nhiều nhé

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