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thanhhoang88
2 năm trước
Bài 1:Cho đa thức B = 4x2y– 7xy2 + 6x2y – 10 x2y + 5x3y2. a) Thu gọn đa thức B. b) Tìm bậc của đa thức B. c) Tính giá trị của đa thức B tại x = 2 , y = -3. Bài 2: (1.0 điểm). Cho đa thức C = 3x2 + 8x + 4 – 4x2– 8x – 3. Tìm x để đa thức C nhận giá trị là -3.
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