[...]... PhÐp chia cã d 1 PhÐp chia hÕt VÝ dô 1: Thùc hiÖn phÐp chia: VÝ dô 2: Thùc hiÖn phÐp chia: (2x4 - 13x3 + 15x2 + 11x - 3) :(x2 - 4x - 3) (5x3 - 3x2 + 7) : (x2 + 1) - 2x4 - 13x3 + 15x2 + 11x - 3 x2 - 4x - 3 2x - 8x - 6x 2 3 - - 5x + 21x + 11x - 3 - 5x3 + 20x2 + 15x 2 - x - 4x - 3 x2 - 4x - 3 2x2 - 5x + 1 4 VËy: 3 2 0 2x4 - 13x3 + 15x2 + 11x – 3 - 5x3 - 3x2 + 5x 5x3 - +7 - 3x2 - 5x - 3x2 VËy: x2 + 1 5x - 3. .. - 5x + 1 4 VËy: 3 2 0 2x4 - 13x3 + 15x2 + 11x – 3 - 5x3 - 3x2 + 5x 5x3 - +7 - 3x2 - 5x - 3x2 VËy: x2 + 1 5x - 3 +7 -3 - 5x + 10 5x3 - 3x2 + 7 = (x2 + 1)(5x - 3) - 5x + 10 = (x2 - 4x – 3) .(2x2 - 5x + 1 ) - Nắm vững “thuật toán” chia đa thức một biến đã sắp xếp - BTVN: 67; 68; 69 SGK / 31 - Giờ sau: Luyện tập . (2x 4 - 13x 3 + 15x 2 + 11x - 3) :(x 2 - 4x - 3) 2x 4 - 13x 3 + 15x 2 + 11x - 3 x 2 - 4x - 3 2x 2 2x 4 - 8x 3 - 6x 2 - 5x 3 + 21x 2 + 11x - 3 - 5x - - 5x 3 + 20x 2 + 15x x 2 - 4x - 3 x 2 -. Thùc hiÖn phÐp chia: (2x 4 - 13x 3 + 15x 2 + 11x - 3) :(x 2 - 4x - 3) 2x 4 - 13x 3 + 15x 2 + 11x - 3 x 2 - 4x - 3 2x 2 2x 4 - 8x 3 - 6x 2 - 5x 3 + 21x 2 + 11x - 3 - 5x - - 5x 3 + 20x 2 +. hiÖn phÐp chia: (5x 3 - 3x 2 + 7) : (x 2 + 1) 5x 3 - 3x 2 + 7 x 2 + 1 - 5x + 5x 5x 3 - 3 - 3x 2 - 5x + 7 - 3x 2 - 3 - 5x + 10 - - VÝ dô 1: Thùc hiÖn phÐp chia: (2x 4 - 13x 3 + 15x 2