vo ti

www.nguoithay.com Gi i ph ng trình: 5x  17  8x3  12 x2  3x  19 Gi i: cách gi i dài x  17  x3  12 x2  3x  19  x  17   x3  12 x2  3x  22  x  2(n)  5( x  2)    x   8 x2  x  11    x2  x  111 3  5x  17   x  17    x  17   3 x  17    21 21   1; VP   x      1 1  VT  35 2 2  ( x  17  )2  Cách gi i ng n x  17  x3  12 x2  3x  19   x  17   x  17   x  1   x  1  x  17   x  1 3