1 x 1 x 5 6 7 July 8, 2019 16 32 64 128 1 x 3 1 x 5 6 7 1 x 2 1 x 5 6 7 1 5 1 5 x )= 6 7 5x 5 6 x 1 1 5 x 7 8 1 1 8 x 4 1 5 x 1 6 7 1 x 1 1 x 5 6 7 by quadratic formula X 1 phần x 5 6 7 X 1 2 6 1 x 5 7 10 Tìm x x 1 x 5 6 7 1 5 x 1 7
